November 1, 2008
Lit. No. 22373, Rev. 07
SNOWPLOWS
ELECTRICAL SCHEMATICS GUIDE
Including
3- and 4-Port Isolation Modules with
2- and 3-Plug Systems and Relay Systems
TABLE OF CONTENTS
Preface .............................................................................................................. 4
4-Port Isolation Module Systems ................................................................ 28
Lamp Types and Harness Connectors .............................................................. 5
Headlamp Index .............................................................................................. 28
Electrical Connectors – 3-Plug Systems ........................................................... 6
Theory of Operation – Overview ..................................................................... 29
Electrical Connectors – 2-Plug Systems ........................................................... 7
4-Port Isolation Module System ...................................................................... 30
In-Line Adapter Instructions – 28027-2 ............................................................. 8
4-Port Isolation Module System – Adapter Kits .............................................. 31
Vehicle Harness with Relay – 29861................................................................. 9
Configuration Plug Instructions – 26421 ......................................................... 32
Electrical Schematic – 3-Plug Straight Blade Snowplows (3-Pin) .................. 33
3-Port Isolation Module Systems ................................................................ 10
Electrical Schematic – 3-Plug MVP Snowplows (7-Pin) ................................. 34
Headlamp Index .............................................................................................. 10
Electrical Schematic – 2-Plug MVP PLUS Snowplows (11-Pin) ...................... 35
Theory of Operation – Overview ..................................................................... 11
Electrical Schematic – 2-Plug WIDE-OUT Snowplows (11-Pin) ..................... 36
Theory of Operation – White Label Non-DRL Module .................................... 12
Headlamp Wiring ............................................................................................. 37
Theory of Operation – Green Label DRL Module ........................................... 13
Theory of Operation – Blue Label DRL Module .............................................. 14
Relay System ................................................................................................. 47
Electrical Schematic – 3-Plug Straight Blade Snowplows (11-Pin) ................. 15
Relay System – Headlamp Index .................................................................... 47
Electrical Schematic – 3-Plug MVP® Snowplows ........................................... 16
Relay System – Electrical Connectors ............................................................ 49
Electrical Schematic – 3-Plug Straight Blade Snowplows
with Central Hydraulics ............................................................................. 17
7-Pin Harness .................................................................................................. 50
Electrical Schematic – 2-Plug MVP PLUS™ Snowplows (11-Pin) .................. 18
Electrical Schematic – 9-Pin Vehicle Harness – Revision 1–9 ....................... 54
Electrical Schematic – 2-Plug WIDE-OUT™ Snowplows (11-Pin) .................. 19
9-Pin Harness ................................................................................................. 55
Headlamp Wiring ............................................................................................. 20
Electrical Schematic – 12-Pin Vehicle Harness – Revision 8 and Later ......... 71
Electrical Schematic – 9-Pin Vehicle Harness – Revision 10 and Later ......... 53
Electrical Schematic – 12-Pin Vehicle Harness – Revision 1–7 ..................... 72
12-Pin Harness ................................................................................................ 73
MVP Electrical Schematic ............................................................................... 87
MVP Electrical Schematic – For 2003 GM and Dodge ................................... 88
Wiring Diagram – 61185 Park or Turn Harness Kit ......................................... 89
Electrical Legend and Wire Colors .................................................................. 90
Lit. No. 22373, Rev. 07
November 1, 2008
3
PREFACE
INTRODUCTION
HOW TO USE THIS BOOK
The purpose of this book is to
provide the trained mechanic with a
comprehensive reference to assist in
diagnosis and repair of WESTERN ®
snowplow electrical systems. It
contains schematics, diagrams and
charts which supply information for
the various types of vehicle and
plow headlamp systems. Although
intended primarily as a diagnostic
tool for headlamp systems, the
hydraulic system circuitry is also
included to show the complete
electrical system.
Use the information in the Headlamp
Index to locate the electrical
schematic for the vehicle. All
headlamp harnesses are tagged
with the harness part number. The
schematic is an abstract drawing
showing the purpose of each
component in the system. Where
possible, component locations are
indicated by enclosures on the
schematic. The Lamp Type, Wire
Color and Connector Identification
charts and diagrams will give
specific wire colors, their function
and locations in connectors. Any
special notes are found in the
upper right corner of the schematic.
Further information and a specific
troubleshooting guide may be
found in the appropriate Mechanic's
Guides.
The 9- and 12-pin Vehicle Side
schematics (relay system) contain all
vehicle headlamp and harness types.
The 7-pin Vehicle Side Schematics
show only a few representatives
applications. For other 7-pin vehicle
headlamp and harness types, refer
to the corresponding 9-pin Vehicle
Side schematic and use only the
headlamp circuitry.
Lit. No. 22373, Rev. 07
EARLY REVISION VEHICLE
HARNESSES (RELAY
SYSTEM)
All 9- and 12-pin vehicle harnesses
are labeled with a white tag
indicating the harness part number
and revision level. Early 9-pin
harness revisions 1–9 and 12-pin
harness revisions 1–7 have a
ground circuit in which the control,
motor relay, and headlamp relays
all ground through the 9- or 12-pin
connector. Some of these early
revision harnesses also have a diode
in the ground wire to the headlamp
relays. Complete 9- and 12-pin
system schematics showing this
early revision ground configuration
are included in the relay section of
the book. These schematics are for
early revision harnesses using only
the solenoid control. If a handheld
control has been installed, the
ground circuit has been modified
into the later revision configuration,
in which only the headlamp relays
ground through the 9- or 12-pin
connector and the control and
motor relay ground separately to the
battery. Early revision harnesses
may be easily identified by a single
black/orange wire on one of the
motor relay primary terminals which
does not continue on to the negative
battery terminal. All vehicle side
schematics in this book show only
the later revision circuitry.
GROUNDS AND COMMONS
Notice that "ground" on the harness
connectors may be referred to as
"common". Most domestic vehicles
use a high side drive headlamp
system in which power is supplied
by the switch to either headlamp.
The headlamps have a common
connection to ground. Some
import vehicles as well as 1999
to 2002 Chevrolet/GMC, Dodge
use a low side drive headlamp
system in which power is supplied
to the common connection of the
headlamps. Ground is supplied to
either headlamp by the switch.
Whether the terminal in the
headlamp harness is actually a
negative ground or a positive 12-volt
common depends on what type
of vehicle headlamp system it is
installed into. Prior to the publication
of this book, all Western Products
electrical schematics showed
"ground" whether or not it was a true
ground or a 12-volt common. Some
of these early schematics appear
in this book. Newer schematics of
low side drive systems will show the
more accurate term "common" where
appropriate.
November 1, 2008
4
Lit. No. 22373, Rev. 07
HIGH
GROUND
2E
GROUND
Bulb
Type
Headlamp
Type
Bulb
Type
LF
UF
1A1
2A1
2A1
2B1
2D1
2E1
H4703
H4701
H4851
H4652 (GMC/Chevy)
H4656 (Mitsubishi)
H6054
H6024
H6545
H13
HB-1
HB-2
HB-3
HB-4
HB-5
H11
9008
9004
9003
9005
9006
9007
H11
HIGH
RED (HIGH)
Headlamp
Type
BLUE (GND)
LOW
BLUE (GND)
HIGH
GROUND
YELLOW (LOW)
HB-5
GREEN (HIGH)
YELLOW (lOW)
BLUE (GND)
HIGH
BLUE (GND)
YELLOW (LOW)
LOW
GREEN (HIGH)
BLUE (GND)
LOW
GREEN (HIGH)
BLUE (GND)
YELLOW (LOW)
ORANGE (LOW)
BLUE (GND)
RED (HIGH)
HB-3 / HB-4
BLUE (GND)
ORANGE (LOW)
RED (HIGH)
HIGH
BLUE (GND)
LOW
GREEN (HIGH)
HB2, 2B/2D
LOW
YELLOW (LOW)
HIGH
YELLOW (LOW)
GROUND
BLUE (GND)
LOW
RED (HIGH)
ORANGE (LOW)
GROUND
GROUND
BLUE (GND)
HIGH
GROUND
GREEN (HIGH)
NOTE: Blue ground wires may be LT or DK BLU, w/ or w/o WHT stripe,
depending on harness.
BLUE (GND)
HB-3 / HB-4
ORANGE (LOW)
LOW
BLUE (GND)
NOTE: The lamp type is usually embossed in the headlamp lens.
GREEN (HIGH)
YELLOW (LOW)
BLUE (GND)
1A/2A
RED (HIGH)
COMMON
(12V)
RED (HIGH)
LOW
BLUE (GND)
(Lowside Drive System)
ORANGE (LOW)
LOW
BLUE (GND)
GROUND
YELLOW (LOW)
BLUE
(COMMON 12V)
HIGH
RED (HIGH)
HIGH
HIGH
COMMON
(12V)
BLUE (GND)
H13
GREEN (HIGH)
BLUE or PINK
(COMMON 12V)
LOW
RED (HIGH)
BLUE (GND)
LOW
ORANGE (LOW)
BLUE
(COMMON 12V)
HB-3 / H11
ORANGE (LOW)
COMMON
(12V)
GREEN (HIGH)
YELLOW (LOW)
COMMON
RED (HIGH)
BLUE
(COMMON 12V)
DK BLUE (LOW)
DK BLUE
(COMMON 12V)
HIGH
BLUE (GND)
YELLOW (LOW)
HIGH
BLUE (COMMON)
LOW
DK BLUE (HIGH)
DK BLUE
(COMMON 12V)
DK BLUE (LOW)
DK BLUE
(COMMON 12V)
COMMON
(12V)
GREEN (HIGH)
ORANGE (LOW)
LT BLUE (COMMON)
RED (HIGH)
DK BLUE (HIGH)
DK BLUE
(COMMON 12V)
LAMP TYPES AND HARNESS CONNECTORS
LF / UF
GROUND
HIGH
HIGH
LOW
GROUND
LOW
GROUND
5
HIGH
HB1
GROUND
GROUND
HIGH LOW
LOW
LOW
GROUND
November 1, 2008
4-PORT & 3-PORT ISOLATION MODULE – ELECTRICAL CONNECTORS – 3-PLUG SYSTEMS
Solenoid Control Connectors
Control Side
(end view)
6
3
5
2
4
1
Plow Control Harnesses
Pin No. Solenoid Control Wire Color Only
1
White
2
Green
3
Brown
4
Black
5
Blue
6
Red
Plow (End View)
1
(pins)
2
3
6
2
5
1
4
Pin No.
1
2
3
4
5
6
Wire Color
Red/Yellow
Light Green
Orange/Black
Brown/Red
Light Blue
White/Yellow
Control Function
+12V
Valve S2
Ground
Motor Relay
Valve S3
Valve S1
4
5
6
8 9 10 11
(Sockets)
7
Vehicle Side
(end view)
3
Plow (End View)
1
2
3
4
5
6
(sockets)
MVP® Blade Control Connectors
3
7
11
14
1
4
8
12
(Front View)
Pin No.
1
2
3
4
5
6
7
8
9
10
Wire Color
Light Blue w/Orange Stripe
Blue w/Orange Stripe
Black w/White Stripe
Light Green
Light Blue
White w/Yellow Stripe
Brown w/Red Stripe
Red w/Yellow Stripe
Orange w/Black Stripe
Brown w/Green Stripe
7
8 9 10 11
(Sockets)
Plow Lighting Harness
Plow (End View)
7
8
9 10 11
MVP Blade to Straight Blade Adapter Kit PN 66760K
1
Lit. No. 22373, Rev. 07
2
3 4 5
(Pins)
6
Pin No.
1
2
3
4
5
6
7
8
9
10
11
3-Pin
Wire Color
Control Function
—
—
—
—
Light Blue
Valve S3
Light Green
Valve S2
—
—
—
—
—
—
—
—
White/Yellow
Valve S1
—
—
—
—
7-Pin
Pin No. Wire Color
Control Function
1
Black/White
Valve S4
2
—
—
3
Light Blue
Valve S2
4
Light Green
Valve S3
5
—
—
6
Red
+12V
7
—
—
8
Blue/Orange
Valve S5
9
White/Yellow
Valve S1
10
Lt Blue/Orange
Valve S6
11
—
—
11-Pin
Pin No. Wire Color
Control Function
1
Black/White
PS Low Beam
2
Black/Orange
Ground
3
White/Yellow
PS High Beam
4
White
DS High Beam
5
Blue/Orange
PS Common
6
Black
DS Low Beam
7
Black/Orange
Ground
8
Gray
Left Directional
9
Purple
Right Directional
10
Brown
Parking Lights
11
Light Blue
DS Common
November 1, 2008
6
4-PORT & 3-PORT ISOLATION MODULE – ELECTRICAL CONNECTORS – 2-PLUG SYSTEMS
Solenoid Control Connectors
Control Side
(end view)
3
4
1
2
Multiplex Harnesses
Pin No. Solenoid Control Wire Color Only
1
Red
2
Green
3
White
4
Black
Plow (End View)
4
1
Pin No.
1
2
3
4
4-Pin
Wire Color
Control Function
Red
+12V
Black
Ground
Tan
Signal
White
Signal
(pins)
Vehicle Side
(end view)
4
3
2
1
Pin No.
1
2
3
4
Wire Color
Red
Red
Black
Black
Control Function
+12V
Signal
Signal
Ground
2
3
(Sockets)
7
(sockets)
Plow Lighting Harness
Plow (End View)
7
1
8
2
Lit. No. 22373, Rev. 07
9 10 11
3 4 5
(Pins)
6
11-Pin
Pin No. Wire Color
Control Function
1
Black/White
PS Low Beam
2
Black/Orange
Ground
3
White/Yellow
PS High Beam
4
White
DS High Beam
5
Blue/Orange
PS Common
6
Black
DS Low Beam
7
Black/Orange
Ground
8
Gray
Left Directional
9
Purple
Right Directional
10
Brown
Parking Lights
11
Light Blue
DS Common
November 1, 2008
IN-LINE ADAPTER INSTRUCTIONS – 28027-2
In-Line Adapter Relay Connections
CAUTION
Right Low
Beam Relay
ORN
87
GRN
86
87A
85
BLK
ORN
BLK
30
GRN
YEL
87
GRN
86
YEL
87A
30
1
2
3
85
Terminals shown at 87
are used as insulators
Left Low
to prevent a circuit failure
Beam Relay when relay is energized.
8
4
Vehicle Control
Harness
Plug-In
Harnesses
To NEGATIVE (–)
Battery Terminal
In-Line Adapter
Vehicle Lighting Harness
Lit. No. 22373, Rev. 07
To NEGATIVE (–)
Battery Terminal
This adapter is required for vehicles equipped with a 4-headlamp
lighting system that illuminates the low and high beams when in
high-beam mode. This adapter prevents the low beams on the
snowplow from illuminating when placed in high beam.
Plug-In
Harness
To NEGATIVE (–)
Battery Terminal
In-Line Adapter
Vehicle Lighting Harness
November 1, 2008
BLK/ORN
VEHICLE LIGHTING HARNESS – 11-PIN
1
2
3
4
5
6
7
8
9
10
11
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
SPLICE
Vehicle Lighting Harness – 11-Pin
(PN 29861)
SPLICE
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
MODULE COM IN
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT TURN OUT
LEFT TURN OUT
PARK LAMP OUT
LEFT HEADLAMP COM
RIGHT HEADLAMP COM
11-Pin Molded Plugs
RT LOW
RELAY ASSEMBLY
3
BLK/WHT
BLK
BLK/ORN
WHT
BLK/WHT
BLK
1
2
3
4
5
6
1
2
3
4
5
6
4
4
5
2
1
K1
3
4
4
5
2
1
K2
LT LOW
Relay Assembly (PN 29859)
Lit. No. 22373, Rev. 07
November 1, 2008
9
3-PORT ISOLATION MODULE – HEADLAMP INDEX
Lit. No. 22373, Rev. 07
Pages
Headlamp Type
Harness Kit
Harness Part #
20
HB-3/HB-4
29048
28253
21
H13
29049
28986
22
HB-1 or HB-5
29050
28930
23
2B/2D or HB-2
29051
28464
24
HB-3/HB-4
4-Pin Connectors
29052
28924
25
2B/2D or 1A/2A
5-Pin Connectors
29053
29058
26
2B/2D
7-Pin Connectors
29054
29270
27
HB-3/H11
29400-2
29499
10
November 1, 2008
3-PORT ISOLATION MODULE – THEORY OF OPERATION
Overview
The Isolation Module acts as an
electrical hub, automatically directing
vehicle power to the appropriate
vehicle or snowplow lighting devices,
while also supplying battery power to
the snowplow control.
The vehicle high and low beams
enter and exit the Isolation Module
through positions B (left side lighting)
and position C (right side lighting).
Park, turn, and DRL signals also
enter through positions B and C.
the Isolation Module via the plug-in
harness. When the snowplow is
not attached to the vehicle, the
signal passes through the normally
closed relay contacts to the vehicle
headlamps. During this time, the
Isolation Module is inactive, placing
no current draw on the vehicle's
electrical system.
Turning ON the vehicle parking
lights activates a series of relays,
automatically transferring the vehicle
high and low beams to the snowplow
while supplying battery power directly
to the snowplow parking lights. All
snowplow lighting exits the Isolation
Module through position A.
With the snowplow attached, the
Isolation Module is still inactive until
either of the two following conditions
are met: the vehicle parking lights
are turned ON or the vehicle ignition
switch is turned ON.
The output of the vehicle high beam/
low beam select switch is directed to
Turning ON the vehicle ignition
switch energizes a snowplow control
relay, supplying vehicle battery
power directly to the control via the
vehicle control harness and plug-in
harness. The vehicle ignition switch
also supplies power to the vehicle
turn signals. Activating the vehicle
turn signals energizes turn signal
circuit, which supply vehicle battery
power directly to the snowplow turn
signals.
Turn Signal Configuration Plug
11
NOTE: References to "Left" and "Right" are correct for modules located
on the driver's side of the vehicle. The reversible turn signal plug must
be reversed for passenger-side installations.
Driver-Side Module
Lit. No. 22373, Rev. 07
Passenger-Side Module
GRN
GRN
BLU
GRN
BLU
BLU
GRN
BLU
November 1, 2008
3-PORT ISOLATION MODULE – THEORY OF OPERATION
White Label Non-DRL Module
(PN 29060)
Snowplow not attached to vehicle:
System is inactive. Vehicle lighting
system functions normally. Reason:
No ground to module.
Snowplow attached to vehicle:
System is inactive until either the
switched accessory wire or the
vehicle parking lights are activated.
Vehicle and snowplow lighting
systems function as outlined in the
Theory of Operation Overview.
Reason: ground path is established
from battery common to Pin C on
Port A of the 3-port module via the
following harnesses: vehicle battery
cable, vehicle control harness,
adapter, plug-in harness, vehicle
lighting harness and snowplow
lighting harness.
Lit. No. 22373, Rev. 07
• Activating a switched
accessory wire (a key-controlled
power source) applies battery
voltage to the VACC input of the
module, which energizes the
coil of the control power relay
(part of the 3-port module).
Energizing the coil of the control
power relay causes the relay
contacts to shift from the "N.O."
(normally opened) position to the
"N.C." (normally closed) position,
which supplies battery voltage
to the snowplow control via the
plug-in harness and the vehicle
control harness. The switched
accessory wire only controls
battery voltage to the snowplow
control.
• Activating the vehicle park light
circuit applies battery voltage
to the module park circuit input.
The voltage is applied to a
solid state power device, which
causes the device to turn ON
and apply battery voltage to the
snowplow park lamp filaments
via the vehicle and snowplow
lighting harnesses. Voltage is
also applied to the module's
high and low beam relay coils,
which causes the relay contacts
to shift from the "vehicle" to the
"snowplow" position.
• With the four headlamp relays
shifted to the "snowplow"
position, the vehicle high and
low beams are now directed to
the snowplow headlamps via the
vehicle and snowplow lighting
harnesses. Toggling the dimmer
switch between high and low
beam will toggle the snowplow
high and low beams.
• Activating the turn signal
applies battery voltage to the
module turn signal circuit input.
The voltage is applied to a
solid state power device, which
causes the device to turn ON
and apply battery voltage to
the snowplow turn signal lamp
filaments via the vehicle and
snowplow lighting harnesses.
• On vehicles equipped with
DRLs—either integrated into the
vehicle headlamps or separated
into dedicated DRL lamps—this
module will not turn OFF the
vehicle DRLs or transfer them to
the snowplow. DRLs will remain
on the vehicle and operate as the
vehicle manufacturer intended.
November 1, 2008
12
3-PORT ISOLATION MODULE – THEORY OF OPERATION
Green Label DRL Module
(PN 29070)
Snowplow not attached to vehicle:
System is inactive. Vehicle lighting
system functions normally. Reason:
No ground to module.
Snowplow attached to vehicle:
System is inactive until either the
switched accessory wire or the
vehicle parking lights are activated.
Vehicle and snowplow lighting
systems function as outlined in the
Theory of Operation Overview.
Reason: ground path is established
from battery common to Pin C on
Port A of the 3-port module via the
following harnesses: vehicle battery
cable, vehicle control harness,
adapter, plug-in harness, vehicle
lighting harness and snowplow
lighting harness.
• Activating a switched
accessory wire (a key-controlled
power source) applies battery
voltage to the VACC input of the
module. A control circuit senses
the voltage and energizes the
coil of the control power relay
(part of the 3-port module).
Energizing the coil of the control
Lit. No. 22373, Rev. 07
power relay causes the relay
contacts to shift from the "N.O."
(normally opened) position to the
"N.C." (normally closed) position,
which supplies battery voltage
to the snowplow control via the
plug-in harness and the vehicle
control harness. The switched
accessory wire only controls
battery voltage to the snowplow
control.
• Activating the vehicle park
light circuit applies voltage to
the module park circuit input. A
control circuit senses the voltage
and turns ON a solid state
power device, which applies
battery voltage to the snowplow
park lamp filaments via the
vehicle and snowplow lighting
harnesses.
• With the park light circuit
energized, the control circuit
monitors the vehicle high
and low beam inputs. When
battery voltage is sensed, the
appropriate solid state power
devices are turned ON, supplying
battery voltage to the snowplow
headlamps via the vehicle and
snowplow lighting harnesses.
Toggling the dimmer switch
between high and low beam will
toggle the snowplow high and
low beams.
• Activating the turn signal
applies voltage to the module
turn signal circuit input. A control
circuit senses the voltage and
turns ON a solid state power
device, which applies battery
voltage to the snowplow turn
signal lamp filaments via the
vehicle and snowplow lighting
harnesses.
• PN 29070 Only: On vehicles
equipped with DRLs—either
integrated into the vehicle
headlamps or separated into
dedicated DRL lamps—this
module will not turn OFF the
vehicle DRLs. The control
circuit monitors the voltage level
supplied by the vehicle to the
vehicle high and low beams
as well as the dedicated DRL
inputs. When a lower voltage is
sensed on either the high or low
beam inputs or battery voltage
is sensed on the turn signal or
dedicated DRL inputs, the control
circuit turns ON the snowplow
turn signal filaments to operate
as DRLs.
• PN 29070-1 Only: On vehicles
equipped with DRLs integrated
into the vehicle headlamps.
Activation of the switched
accessory wire (a key-controlled
power source) Port C, Position
C, applies battery voltage to the
module's high and low beam
relay coils, which causes the
relay contacts to shift from the
"vehicle" to the "snowplow"
position. This module will
transfer the vehicle headlamp
DRLs to the snowplow (turns
off vehicle DRLs).
• On vehicles equipped with
dedicated DRL bulbs or
vehicles using the turn signals
as DRLs, this module will not
turn OFF the vehicle bulbs.
While the vehicle is in the
DRL mode, this module will
illuminate the snowplow light
turn signal filaments.
November 1, 2008
13
3-PORT ISOLATION MODULE – THEORY OF OPERATION
Blue Label DRL Module
(PN 29760-1)
Snowplow not attached to vehicle:
System is inactive. Vehicle lighting
system functions normally. Reason:
No ground to module.
Snowplow attached to vehicle:
System is inactive until either the
switched accessory wire or the
vehicle parking lights are activated.
Vehicle and snowplow lighting
systems function as outlined in the
Theory of Operation Overview.
Reason: ground path is established
from battery common to Pin C on
Port A of the 3-port module via the
following harnesses: vehicle battery
cable, vehicle control harness,
adapter, plug-in harness, vehicle
lighting harness and snowplow
lighting harness.
Lit. No. 22373, Rev. 07
• Activating a switched
accessory wire (a
key-controlled power source)
applies battery voltage to the
VACC input of the module, which
energizes the coil of the control
power relay (part of the 3-port
module). Energizing the coil of
the control power relay causes
the relay contacts to shift from
the "N.O." (normally opened)
position to the "N.C." (normally
closed) position, which supplies
battery voltage to the snowplow
control via the plug-in harness
and the vehicle control harness.
• Activating the vehicle park light
circuit applies battery voltage
to the module park circuit input.
The voltage is applied to a
solid state power device, which
causes the device to turn ON
and apply battery voltage to the
snowplow park lamp filaments
via the vehicle and snowplow
lighting harnesses. Voltage is
also applied to the module's
high and low beam relay coils,
which causes the relay contacts
to shift from the "vehicle" to the
"snowplow" position.
• With the four headlamp relays
shifted to the "snowplow"
position, the vehicle high and
low beams are now directed to
the snowplow headlamps via the
vehicle and snowplow lighting
harnesses. Toggling the dimmer
switch between high and low
beam will toggle the snowplow
high and low beams.
• Activating the turn signal
applies battery voltage to the
module turn signal circuit input.
The voltage is applied to a
solid state power device, which
causes the device to turn ON
and apply battery voltage to
the snowplow turn signal lamp
filaments via the vehicle and
snowplow lighting harnesses.
• On vehicles equipped with
DRLs integrated into the
vehicle headlamps, activating
a switched accessory wire (a
key-controlled power source)
applies battery voltage to the
module's high and low beam
relay coils, which causes the
relay contacts to shift from the
"vehicle" to the "snowplow"
position. This module will
transfer the vehicle DRLs to the
snowplow.
November 1, 2008
14
3-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
3-PLUG STRAIGHT BLADE SNOWPLOWS (11-PIN)
NOTE: Labeling shown (left and right) is correct
for modules located on the driver's side of the
vehicle. The reversible turn signal plug must be
reversed for passenger-side installations.
Lit. No. 22373, Rev. 07
15
November 1, 2008
3-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
3-PLUG MVP® SNOWPLOWS
LTBLU/ORN
BLU/ORN
BLK/WHT
LTGRN
LTBLU
WHT/YEL
BRN/RED
RED/YEL
BLK/ORN
BRN/GRN
VEHICLE CABLE ASSEMBLY
BATTERY CABLE 22"
PUMP MOTOR
BLK/ORN
1
2
3
4
5
RED
6
7
8
BLU/ORN
9
WHT/YEL
LTBLU/ORN 10
11
BLK/WHT
S2
LTBLU
LTGRN
S3
S4
S5
1
2
3
4
5
6
7
8
9
10
11
A
BLK/WHT
LTBLU
LTGRN
BLK/ORN
B
15A
S1
NEG.
BATTERY
7.5A
POS.
MOTOR RELAY
+
-
A
RED
RED/YEL
RED/WHT
RED/BLK
DKBLU/RED
BLU
DKBLU/WHT
BLU/ORN
WHT/YEL
LTBLU/ORN
S6
BLK/ORN
A
B
C
D
E
F
G
H
J
K
BLK/ORN
SWV-DC
ACC-CC
12V
COM
COM-BK
BLK/ORN
COM-VJ
HIGH-VB
HIGH-CD
LOW-AE
PLOW LIGHTS
PARK
TURN
COM-BK
PARK
TURN-9B
COM
HIGH
LOW
BEAM
TURN
PARK
Lit. No. 22373, Rev. 07
HIGH-3C
COM-5B
LOW-1A
LOW-VA
HIGH-VB
TURN-VB
PARK-VH
LOW-1A
COM
HIGH-3C
HIGH-4C
COM-5B
LOW-6A
COM
TURN-8B
TURN-9B
PARK
COM-11B
HIGH-4C
COM-11B
LOW-6A
PARK
TURN-8B
COM
REVERSABLE TURN
SIGNAL PLUG
F2
12V
12V
C
(BLUE WIRES)
LOW-VA
HIGH-VB
ACC-CC
HIGH-CD
LOW-AE
F2
TURN-AG
DRL-VH
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
LOW-VA
HIGH-VB
SWV-DC
HIGH-CD
LOW-AE
F1
TURN-BG
PARK-VH
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
PLOW LIGHTING
HARNESS, 11 PIN
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
LOW BEAM IN
HIGH BEAM IN
SWITCHED VACC IN
HIGH BEAM OUT
LOW BEAM OUT
MODULE POWER IN
TURN IN
DRL IN
COM
COM
LOW BEAM IN
HIGH BEAM IN
CONTROL PWR OUT
HIGH BEAM OUT
LOW BEAM OUT
CONTROL POWER IN
TURN IN
PARK LAMP IN
COM
COM
A
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
11 PIN MOLDED PLUGS
3 PORT MODULE
B
(GREEN WIRES)
COM-VJ
HIGH
LOW
BEAM
HIGH-CD
LOW-AE
F1 & F2
10 AMP MINI
F1
STYLE FUSES
SP1
TURN-VA
LOW-VA
TO SWITCHED
ACCESSORY LEAD
NOTE:
LABELING SHOWN, LEFT AND RIGHT,
IS CORRECT IF THE MODULE IS
LOCATED ON THE DRIVER'S SIDE OF
THE VEHICLE.
A REVERSIBLE TURN SIGNAL PLUG IS
PROVIDED TO COMPENSATE FOR THE
LEFT OR RIGHT SIDE MODULE
MOUNTING REQUIREMENTS.
D
C
B
A
PLUG-IN HARNESS
(H13 HARNESS SHOWN)
CONTROL
29047
ADAPTER
D
C
B
A
NOTE: Labeling shown (left and right)
is correct for modules located on the
driver's side of the vehicle. The reversible
turn signal plug must be reversed for
passenger-side installations.
1
2
3
4
5
6
7
8
9
10
11
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
RED/YEL
RED
RED/GRN
VEHICLE CONTROL
HARNESS, 7 PIN
A
B
C
D
E
F
G
H
J
K
YEL
VIO
GRY
WHT
ORN
BLU
GRN
RED
TAN
BRN
BLK
RED
RED/YEL
7 PIN MOLDED PLUGS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
B
RED/GRN
BRN/GRN
RED/GRN
BLK/ORN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
E
F
G
H
J
K
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
MODULE COM IN
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT TURN OUT
LEFT TURN OUT
PARK LAMP OUT
LEFT HEADLAMP COM
RIGHT HEADLAMP COM
VEHICLE LIGHTING
HARNESS, 11 PIN
November 1, 2008
16
3-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
3-PLUG STRAIGHT BLADE SNOWPLOWS
WITH CENTRAL HYDRAULICS
VEHICLE CONTROL HARNESS
26498
RED/GRN
TO SWITCHED
ACCESSORY LEAD
29047
ADAPTER
NOTE:
LABELING SHOWN, LEFT AND RIGHT,
IS CORRECT IF THE MODULE IS
LOCATED ON THE DRIVER'S SIDE OF
THE VEHICLE.
A REVERSIBLE TURN SIGNAL PLUG IS
PROVIDED TO COMPENSATE FOR THE
LEFT OR RIGHT SIDE MODULE
MOUNTING REQUIREMENTS.
BLK/ORN
D
C
B
A
SWV-DC
ACC-CC
12V
COM
BLK/ORN
HIGH-VB
HIGH-CD
LOW-AE
TURN-9B
COM
HIGH-CD
LOW-AE
F1 & F2
10 AMP MINI
F1
STYLE FUSES
REVERSABLE TURN
SIGNAL PLUG
F2
SP1
COM-BK
PARK
12V
12V
C
(BLUE WIRES)
LOW-VA
HIGH-VB
ACC-CC
HIGH-CD
LOW-AE
F2
TURN-AG
DRL-VH
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
LOW-VA
HIGH-VB
SWV-DC
HIGH-CD
LOW-AE
F1
TURN-BG
PARK-VH
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
HIGH-3C
COM-5B
LOW-1A
LOW-VA
HIGH-VB
TURN-VB
PARK-VH
LOW-1A
COM
HIGH-3C
HIGH-4C
COM-5B
LOW-6A
COM
TURN-8B
TURN-9B
PARK
COM-11B
HIGH-4C
COM-11B
LOW-6A
PARK
PLOW LIGHTING
HARNESS, 11 PIN
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
LOW BEAM IN
HIGH BEAM IN
SWITCHED VACC IN
HIGH BEAM OUT
LOW BEAM OUT
MODULE POWER IN
TURN IN
DRL IN
COM
COM
LOW BEAM IN
HIGH BEAM IN
CONTROL PWR OUT
HIGH BEAM OUT
LOW BEAM OUT
CONTROL POWER IN
TURN IN
PARK LAMP IN
COM
COM
A
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
11 PIN MOLDED PLUGS
3 PORT MODULE
B
(GREEN WIRES)
COM-VJ
Lit. No. 22373, Rev. 07
RED
D
C
B
A
LOW-VA
PLOW LIGHTS
TURN-8B
COM
CONTROL POWER
IF NEEDED
ORANGE
RED/YEL
RED
RED/GRN
COM-BK
TURN
PARK
B
A
B
C
D
E
F
G
H
J
K
TURN-VA
COM-VJ
HIGH
LOW
BEAM
A
BLK/ORN
PLUG-IN HARNESS
(H13 HARNESS SHOWN)
HIGH
LOW
BEAM
B
A
B
C
D
E
F
G
H
J
K
NOTE: Labeling shown (left and right) is correct
for modules located on the driver's side of the
vehicle. The reversible turn signal plug must be
reversed for passenger-side installations.
PARK
TURN
15A
-
BATTERY
A
RED/BLK
RED/WHT
BRN/GRN
RED
BRN/RED
+
7.5A
CONFIGURATION PLUG IS NOT
REQUIRED WITH 3-PORT
LIGHTING MODULES
A
B
C
D
E
F
G
H
J
K
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
MODULE COM IN
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT TURN OUT
LEFT TURN OUT
PARK LAMP OUT
LEFT HEADLAMP COM
RIGHT HEADLAMP COM
VEHICLE LIGHTING
HARNESS, 11 PIN
November 1, 2008
17
3-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
2-PLUG MVP PLUS™ SNOWPLOWS (11-PIN)
Snowplow Assembly
–
BLK
A
B
C
D
E
F
G
H
J
K
A
BLK
RED
S1
WHT
S2
GRN
S3
BLU
S8
GRY
S9
WHT
S10
GRN
S11
ORN
S7
BRN
S6
YEL
S5
BLK
S4
TAN
RED
RED
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
B
RED
A
B
C
D
E
F
G
H
J
K
On 2-plug electrical systems, plug covers shall
be used whenever snowplow is disconnected.
Vehicle Battery Cable is 12-volt unfused source.
LOW-VA
COM-VJ
HIGH-VB
HIGH-CD
COM-BK
LOW-AE
TURN-VA
C
Plow Module
Typical
Plug-In
Harness
TURN-VB
PARK-VH
HIGH-CD
COM-BK
LOW-AE
LOW-VA
COM-VJ
HIGH-VB
PARK
TURN-9B
COM
C
B
A
HIGH-3C
COM-5B
LOW-1A
Driver-Side Plow Headlamp
C
B
A
TURN
PARK
HIGH-4C
COM-11B
LOW-6A
PARK
TURN-8B
COM
Lit. No. 22373, Rev. 07
Located at Front of Vehicle
LOW-1A
COM
HIGH-3C
HIGH-4C
COM-5B
LOW-6A
COM
TURN-8B
TURN-9B
PARK
COM-11B
Plow
Lighting
Harness,
11 Pin
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
Vehicle
Lighting
Harness,
11 Pin
4
3
3
4
2
1
1
2
1 – Red
2 – Green
3 – White
4 – Black
Control
(connector face view)
Vehicle Control Harness, 4 Wire
RED
RED
BLK
BLK
1
2
3
4
1 RED
2 GRN
3 WHT
4 BLK
4-Pin Plug
(Under Dash)
BLK/ORN
A
B
C
D
E
F
G
H
J
K
C
B
A
C
B
A
BLK
RED
RED
BLK
CAUTION
Passenger-Side Plow Headlamp
HIGH
LOW
BEAM
D
C
B
A
4 Amp Fuse: S4, S5, S6, S7
4 Amp Fuse: S8, S9, S10, S11
RED
HIGH
LOW
BEAM
Battery
D
C
B
A
4 Amp Fuse: S1, S2, S3
4 Amp Fuse: Motor Relay
1 – Red (Control Power)
2 – Red (Twisted with #3)
3 – Black (Twisted with #2)
4 – Black (Control Ground)
+
A BCD
To Switched Accessory Lead
RED
ABCD
COM
12V
ACC-CC
SWV-DC
RED
A
B
C
D
E
F
G
H
J
K
RED
TAN
WHT
RED
Motor
Relay
PARK
TURN
BLK
TAN
BLK
+
RED
WHT
RED
Motor
Vehicle Battery Cable, 4 Receptacle
BLK
RED
Pump –
10 Amp
Control
& Module
Fuses
Reversible
Turn Signal
Plug
18
12V
12V
LOW-VA
HIGH-VB
ACC-CC
HIGH-CD
LOW-AE
F2-CF
TURN-AG
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
LOW-VA
HIGH-VB
SWV-DC
HIGH-CD
LOW-AE
F1-BF
TURN-BG
PARK-VH
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
C
A
B
C
D
E
F
G
H
J
K
B
A
B
C
D
E
F
G
H
J
K
A
A
B
C
D
E
F
G
H
J
K
LOW BEAM IN
HIGH BEAM IN
SWITCHED VACC IN
HIGH BEAM OUT
LOW BEAM OUT
MODULE POWER IN
TURN IN
DRL IN
COM IN
COM OUT
LOW BEAM IN
HIGH BEAM IN
CONTROL PWR OUT
HIGH BEAM OUT
LOW BEAM OUT
CONTROL POWER IN
TURN IN
PARK LAMP IN
COM IN
COM OUT
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
MODULE COM IN
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT TURN OUT
LEFT TURN OUT
PARK LAMP OUT
LEFT HEADLAMP COM
RIGHT HEADLAMP COM
Isolation Module
NOTE: Labeling shown (left and right) is correct for modules located on the driver's side of
the vehicle. The reversible turn signal plug must be reversed for passenger-side installations.
November 1, 2008
3-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
2-PLUG WIDE-OUT™ SNOWPLOWS
Snowplow Assembly
Vehicle Battery Cable, 4 Receptacle
RED
Motor
Relay
RED
DKGRN
WHT
RED
A
B
C
D
E
F
G
H
J
K
S10
DKBLU
RED
S8
GRY
S7
BRN
S6
YEL
S5
BLK
B
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
On 2-plug electrical systems, plug covers shall
be used whenever snowplow is disconnected.
Vehicle Battery Cable is 12-volt unfused source.
LOW-VA
COM-VJ
HIGH-VB
HIGH-CD
COM-BK
LOW-AE
TURN-VA
C
Plow Module
Typical
Plug-In
Harness
TURN-VB
PARK-VH
HIGH-CD
COM-BK
LOW-AE
LOW-VA
COM-VJ
HIGH-VB
PARK
C
B
A
TURN-9B
COM
C
B
A
HIGH
LOW
BEAM
HIGH-3C
COM-5B
LOW-1A
Driver-Side Plow Lamp
C
B
A
HIGH
LOW
BEAM
TURN
PARK
C
B
A
HIGH-4C
COM-11B
LOW-6A
PARK
TURN-8B
COM
Lit. No. 22373, Rev. 07
Located at Front of Vehicle
LOW-1A
COM
HIGH-3C
HIGH-4C
COM-5B
LOW-6A
COM
TURN-8B
TURN-9B
PARK
COM-11B
Plow
Lighting
Harness,
11 Pin
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
Vehicle
Lighting
Harness,
11 Pin
4
3
3
4
2
1
1
2
(connector face view)
Vehicle Control Harness, 4 Wire
RED
RED
BLK
BLK
1
2
3
4
1 – Red
2 – Green
3 – White
4 – Black
Control
1 RED
2 GRN
3 WHT
4 BLK
4-Pin Plug
(Under Dash)
CAUTION
Passenger-Side Plow Lamp
PARK
TURN
BLK
RED
RED
BLK
BLK/ORN
WHT
A
B
C
D
E
F
G
H
J
K
D
C
B
A
4 Amp Fuse: S5, S6, S7, S8
4 Amp Fuse: S9, S10
RED
S9
D
C
B
A
4 Amp Fuse: Sense
4 Amp Fuse: S1, S2,
Motor Relay
BLK
RED
S1
A
1 – Red (Control Power)
2 – Red (Twisted with #3)
3 – Black (Twisted with #2)
4 – Black (Control Ground)
+
Battery
RED
+
A
B
C
D
E
F
G
H
J
K
TAN
BLK
A
B
TAN C
WHT D
E
RED F
G
H
J
BLK K
WHT
–
RED
S2
BLK
A BCD
To Switched Accessory Lead
RED
ABCD
COM
12V
ACC-CC
SWV-DC
Pump –
Motor
10 Amp
Control
& Module
Fuses
Reversible
Turn Signal
Plug
19
12V
12V
LOW-VA
HIGH-VB
ACC-CC
HIGH-CD
LOW-AE
F2-CF
TURN-AG
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
LOW-VA
HIGH-VB
SWV-DC
HIGH-CD
LOW-AE
F1-BF
TURN-BG
PARK-VH
COM-BJ
COM-BK
A
B
C
D
E
F
G
H
J
K
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
C
A
B
C
D
E
F
G
H
J
K
B
A
B
C
D
E
F
G
H
J
K
A
A
B
C
D
E
F
G
H
J
K
LOW BEAM IN
HIGH BEAM IN
SWITCHED VACC IN
HIGH BEAM OUT
LOW BEAM OUT
MODULE POWER IN
TURN IN
DRL IN
COM IN
COM OUT
LOW BEAM IN
HIGH BEAM IN
CONTROL PWR OUT
HIGH BEAM OUT
LOW BEAM OUT
CONTROL POWER IN
TURN IN
PARK LAMP IN
COM IN
COM OUT
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
MODULE COM IN
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT TURN OUT
LEFT TURN OUT
PARK LAMP OUT
LEFT HEADLAMP COM
RIGHT HEADLAMP COM
Isolation Module
NOTE: Labeling shown (left and right) is correct for modules located on the driver side of the
vehicle. The reversible turn signal plug must be reversed for passenger-side installations.
November 1, 2008
HEADLAMP WIRING – 29048 HARNESS KITS (HB-3/HB-4)
Harness Part #28253
Location
A
B
Wire Color
Stamp
Black Female Plug
DK BLUE
COM-AJ
DK BLUE
HIGH-BB
A
B
2-Key Male Plug
DK BLUE
HIGH-AD
DK BLUE
COM-BK
A
B
Gray Female Plug
DK BLUE
COM-BA
DK BLUE
LOW-BA
A
B
1-Key Male Plug
DK BLUE
LOW-AE
DK BLUE
COM-BA
Loose
Splice Tap Wires
DK BLUE
TURN-VA
A
B
C
D
E
F
G
H
J
K
10-Position Plug "C"
DK BLUE
LOW-BA
DK BLUE
HIGH-BB
RED
ACC-CC
DK BLUE
HIGH-AD
DK BLUE
LOW-AE
RED
F2-CF
DK BLUE
TURN-AG
DK BLUE
DRL-VH
DK BLUE
COM-AJ
DK BLUE
COM-BK
Lit. No. 22373, Rev. 07
Plugs for Harness #28253
Black Female Plug
2-Key Male Plug
Gray Female Plug
Harness Part #28253
Location
A
B
Wire Color
Stamp
Black Female Plug
DK GREEN
COM-AJ
DK GREEN
HIGH-BB
A
B
2-Key Male Plug
DK GREEN
HIGH-AD
DK GREEN
COM-BK
A
B
Gray Female Plug
DK GREEN
COM-BA
DK GREEN
LOW-BA
A
B
1-Key Male Plug
DK GREEN
LOW-AE
DK GREEN
COM-BA
Loose
Loose
Loose
Splice Tap Wires
DK GREEN
TURN-VB
DK GREEN
PARK-VH
DK BLUE
DRL-VH
1-Key Male Plug
10-Position Plug
for Harness #28253
A
B
C
D
E
F
G
H
J
K
10-Position Plug "B"
DK GREEN
LOW-BA
DK GREEN
HIGH-BB
RED
SWV-DC
DK GREEN
HIGH-AD
DK GREEN
LOW-AE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK-VH
DK GREEN
COM-AJ
DK GREEN
COM-BK
November 1, 2008
20
HEADLAMP WIRING – 29049 HARNESS KIT (H13)
Harness Part #28986
Location
A
B
C
A
B
C
Loose
A
B
C
D
E
F
G
H
J
K
Wire Color
Female Plug
DK BLUE
DK BLUE
DK BLUE
Stamp
LOW-AE
COM-BK
HIGH-CD
Male Plug
DK BLUE
DK BLUE
DK BLUE
LOW-AA
COM-BJ
HIGH-CB
Harness Part #28986
Plugs for Harness #28986
Female Plug
A
B
C
Male Plug
Splice Tap Wires
DK BLUE
TURN-VA
10-Position Plug "C"
DK BLUE
LOW-AA
DK BLUE
HIGH-CB
RED
ACC-CC
DK BLUE
HIGH-CD
DK BLUE
LOW-AE
RED
F2-CF
DK BLUE
TURN-AG
—
—
DK BLUE
COM-BJ
DK BLUE
COM-BK
Lit. No. 22373, Rev. 07
Location
A
B
C
Loose
Loose
10-Position Plug
for Harness #28986
A
B
C
D
E
F
G
H
J
K
Wire Color
Female Plug
DK GREEN
DK GREEN
DK GREEN
Stamp
LOW-AE
COM-BJ
HIGH-CD
Male Plug
DK GREEN
DK GREEN
DK GREEN
LOW-AA
COM-BK
HIGH-CB
Splice Tap Wires
DK GREEN
TURN-VB
DK GREEN
PARK-VH
10-Position Plug "B"
DK GREEN
LOW-AA
DK GREEN
HIGH-CB
RED
SWV-DC
DK GREEN
HIGH-CD
DK GREEN
LOW-AE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK-VH
DK GREEN
COM-BJ
DK GREEN
COM-2K
November 1, 2008
21
HEADLAMP WIRING – 29050 HARNESS KIT (HB-1 OR HB-5) (1A/2A1)
Harness Part #28930
Harness Part #28930
Plugs for Harness #28930
Location
Wire Color
Stamp
Black Molded Female Plug
1
—
—
2
DK BLUE
COM-2J
3
DK BLUE
HIGH-3B
4
DK BLUE
LOW-4A
5
—
—
Black Molded Female Plug
Blue Molded Male Plug
A*
DK BLUE
LOW-AE
B*
DK BLUE
COM-BK
C
DK BLUE
HIGH-CD
*Reversed for HB-1 Applications
Loose
A
B
C
D
E
F
G
H
J
K
Blue Male Plug
Splice Tap Wires
DK BLUE
TURN-VA
Location
Wire Color
Stamp
Black Molded Female Plug
1
—
—
2
DK GREEN
COM-2K
3
DK GREEN
HIGH-3B
4
DK GREEN
LOW-4A
5
—
—
Blue Molded Male Plug
A*
DK GREEN
LOW-AE
B*
DK GREEN
COM-BJ
C
DK GREEN
HIGH-CD
*Reversed for HB-1 Applications
Loose
Loose
10-Position Plug "C"
DK BLUE
LOW-4A
DK BLUE
HIGH-3B
RED
ACC-CC
DK BLUE
HIGH-CD
DK BLUE
LOW-AE
RED
F2-CF
DK BLUE
TURN-AG
—
—
DK BLUE
COM-2J
DK BLUE
COM-BK
10-Position Plug
for Harness #28930
A
B
C
D
E
F
G
H
J
K
Splice Tap Wires
DK GREEN
TURN-VB
DK GREEN
PARK-VH
10-Position Plug "B"
DK GREEN
LOW-4A
DK GREEN
HIGH-3B
RED
SWV-DC
DK GREEN
HIGH-CD
DK GREEN
LOW-AE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK-VH
DK GREEN
COM-BJ
DK GREEN
COM-2K
Not shown. Requires adapter kit 26641.
1
Lit. No. 22373, Rev. 07
November 1, 2008
22
HEADLAMP WIRING – 29051 HARNESS KIT (2B/2D)
Harness Part #28464
Location
A
B
C
A
B
C
Loose
A
B
C
D
E
F
G
H
J
K
Wire Color
Female Plug
DK BLUE
DK BLUE
DK BLUE
Stamp
COM-AK
LOW-BE
HIGH-CD
Male Plug
DK BLUE
DK BLUE
DK BLUE
HIGH-AB
LOW-BA
COM-CJ
Harness Part #28464
Plugs for Harness #28464
Female Plug
A
B
C
Male Plug
Splice Tap Wires
DK BLUE
TURN-VA
10-Position Plug "C"
DK BLUE
LOW-BA
DK BLUE
HIGH-AB
RED
ACC-CC
DK BLUE
HIGH-CD
DK BLUE
LOW-BE
RED
F2-CF
DK BLUE
TURN-AG
—
—
DK BLUE
COM-BJ
DK BLUE
COM-AK
Lit. No. 22373, Rev. 07
Location
A
B
C
Loose
Loose
10-Position Plug
for Harness #28464
A
B
C
D
E
F
G
H
J
K
Wire Color
Female Plug
DK GREEN
DK GREEN
DK GREEN
Stamp
COM-AK
LOW-BE
HIGH-CD
Male Plug
DK GREEN
DK GREEN
DK GREEN
HIGH-AB
LOW-BA
COM-CJ
Splice Tap Wires
DK GREEN
TURN-VB
DK GREEN
PARK-VH
10-Position Plug "B"
DK GREEN
LOW-BA
DK GREEN
HIGH-AB
RED
SWV-DC
DK GREEN
HIGH-CD
DK GREEN
LOW-BE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK-VH
DK GREEN
COM-CJ
DK GREEN
COM-AK
November 1, 2008
23
HEADLAMP WIRING – 29052 HARNESS KIT (HB-3/HB-4)
Harness Part #28924
Location
A
B
C
D
Wire Color
Female Plug
DK BLUE
DK BLUE
DK BLUE
DK BLUE
HIGH-AB
LOW-BA
COM-CJ
COM-DD
A
B
C
D
Male Plug
DK BLUE
DK BLUE
DK BLUE
DK BLUE
HIGH-AD
LOW-BE
COM-CK
COM-DD
Loose
A
B
C
D
E
F
G
H
J
K
Stamp
Harness Part #28924
Plugs for Harness #28924
A
B
C
D
Wire Color
Female Plug
DK GREEN
DK GREEN
DK GREEN
DK GREEN
HIGH-AB
LOW-BA
COM-CK
COM-DD
A
B
C
D
Male Plug
DK GREEN
DK GREEN
DK GREEN
DK GREEN
HIGH-AD
LOW-BE
COM-CJ
COM-DD
Female Plug
Male Plug
Splice Tap Wires
DK BLUE
TURN-VA
10-Position Plug "C"
DK BLUE
LOW-BA
DK BLUE
HIGH-AB
RED
ACC-CC
DK BLUE
HIGH-AD
DK BLUE
LOW-BE
RED
F2-CF
DK BLUE
TURN-AG
—
—
DK BLUE
COM-CJ
DK BLUE
COM-CK
Lit. No. 22373, Rev. 07
Location
Loose
Loose
10-Position Plug
for Harness #28924
A
B
C
D
E
F
G
H
J
K
Stamp
Splice Tap Wires
DK GREEN
TURN-VB
DK GREEN
PARK-VH
10-Position Plug "B"
DK GREEN
LOW-BA
DK GREEN
HIGH-AB
RED
SWV-DC
DK GREEN
HIGH-AD
DK GREEN
LOW-BE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK-VH
DK GREEN
COM-CJ
DK GREEN
COM-CK
November 1, 2008
24
HEADLAMP WIRING – 29053 HARNESS KIT (2B/2D OR 1A/2A)
Harness Part #29058
Location
A
B
C
D
E
Wire Color
Female Plug
DK BLUE
DK BLUE
DK BLUE
DK BLUE
DK BLUE
HIGH-AD
LOW-BE
COM-CJ
TURN
PARK
A
B
C
D
E
Male Plug
DK BLUE
DK BLUE
DK BLUE
DK BLUE
DK BLUE
HIGH-AB
LOW-BA
COM-CK
TURN
PARK
A
B
C
D
E
F
G
H
J
K
Stamp
Plugs for Harness #29058
Location
A
B
C
D
E
Wire Color
Female Plug
DK GREEN
DK GREEN
DK GREEN
DK GREEN
DK GREEN
HIGH-AD
LOW-BE
COM-CK
TURN
PARK
A
B
C
D
E
Male Plug
DK GREEN
DK GREEN
DK GREEN
DK GREEN
DK GREEN
HIGH-AB
LOW-BA
COM-CJ
TURN
PARK
Female Plug
10-Position Plug "C"
DK BLUE
LOW-BA
DK BLUE
HIGH-AB
RED
ACC-CC
DK BLUE
HIGH-AD
DK BLUE
LOW-BE
RED
F2-CF
DK BLUE
TURN-AG
—
—
DK BLUE
COM-CJ
DK BLUE
COM-CK
Lit. No. 22373, Rev. 07
Harness Part #29058
Male Plug
10-Position Plug
for Harness #29058
A
B
C
D
E
F
G
H
J
K
Stamp
10-Position Plug "B"
DK GREEN
LOW-BA
DK GREEN
HIGH-AB
RED
SWV-DC
DK GREEN
HIGH-AD
DK GREEN
LOW-BE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK
DK GREEN
COM-CJ
DK GREEN
COM-CK
November 1, 2008
25
HEADLAMP WIRING – 29054 HARNESS KIT (2B/2D)
Harness Part #29270
Location
A
B
C
D
E
F
G
A
B
C
D
E
F
G
A
B
C
D
E
F
G
H
J
K
Wire Color
Stamp
7-Pin Female Plug
BLACK
PARK
BLACK
LOW
BLACK
L TURN
BLACK
R TURN
BLACK
HIGH
—
—
BLACK
COM
7-Pin Male Plug
BLACK
BLACK
BLACK
BLACK
BLACK
—
BLACK
7-Pin Female Plug
PARK
LOW
L TURN
R TURN
HIGH
—
COM
10-Position Plug "C"
BLACK
LOW
BLACK
HIGH
RED
ACC
—
—
—
—
RED
F2
BLACK
R TURN
—
—
—
—
BLACK
COM
Lit. No. 22373, Rev. 07
Plugs for Harness #29270
7-Pin Male Plug
26
Harness Part #29270
10-Position Plug
for Harness #29270
Location
Wire Color
Stamp
10-Position Plug "B"
A
BLACK
LOW
B
BLACK
HIGH
C
RED
SWV
D
BLACK
HIGH
E
BLACK
LOW
F
RED
F1
G
BLACK
L TURN
H
BLACK
PARK
J
BLACK
COM
K
BLACK
COM
November 1, 2008
HEADLAMP WIRING – 29400-2 HARNESS KITS (HB-3/H11)
Harness Part #29499
Location
A
B
Wire Color
Stamp
HB-3 Female Plug
DK BLUE
COM-AJ
DK BLUE
HIGH-BB
A
B
HB-3 Male Plug
DK BLUE
HIGH-AD
DK BLUE
COM-BK
A
B
H11 Female Plug
DK BLUE
COM-AA
DK BLUE
LOW-BA
A
B
Loose
A
B
C
D
E
F
G
H
J
K
H11 Male Plug
DK BLUE
DK BLUE
HB-3 Female Plug
HB-3 Male Plug
H11 Female Plug
10-Position Plug "C"
DK BLUE
LOW-BA
DK BLUE
HIGH-BB
RED
ACC-CC
DK BLUE
HIGH-AD
DK BLUE
LOW-BE
RED
F2-CF
DK BLUE
TURN-AG
DK BLUE
DRL-VH
DK BLUE
COM-AJ
DK BLUE
COM-BK
Harness Part #29499
Location
A
B
Wire Color
Stamp
HB-3 Female Plug
DK GREEN
COM-AJ
DK GREEN
HIGH-BB
A
B
HB-3 Male Plug
DK GREEN
HIGH-AD
DK GREEN
COM-BK
A
B
H11 Female Plug
DK GREEN
COM-AA
DK GREEN
LOW-BA
A
B
COM-AA
LOW-BE
Splice Tap Wires
DK BLUE
TURN-VA
Lit. No. 22373, Rev. 07
Plugs for Harness #29499
H11 Male Plug
Loose
Loose
Loose
10-Position Plug
for Harness #29499
A
B
C
D
E
F
G
H
J
K
H11 Male Plug
DK GREEN
DK GREEN
COM-AA
LOW-BE
Splice Tap Wires
DK GREEN
TURN-VB
DK GREEN
PARK-VH
DK BLUE
DRL-VH
10-Position Plug "B"
DK GREEN
LOW-BA
DK GREEN
HIGH-BB
RED
SWV-DC
DK GREEN
HIGH-AD
DK GREEN
LOW-BE
RED
F1-BF
DK GREEN
TURN-BG
DK GREEN
PARK-VH
DK GREEN
COM-AJ
DK GREEN
COM-BK
November 1, 2008
27
4-PORT ISOLATION MODULE – HEADLAMP INDEX
Headlamp Type
H13
HB-3/H11
HB-3/HB-4
2B/2D
or
HB-2
2E
2B/2D or 1A/2A
2B/2D
HB-5/HB-1 (Quad)
HB-1
or
HB-5
1A/2A
LF/UF
Lit. No. 22373, Rev. 07
Vehicle(s)
Year(s)
Ford F-150 (New Body Style)
Ford Super Duty
Dodge 1500, 2500, 3500
Dodge Dakota
Dodge Durango
GMC Yukon/Yukon XL (All New)
Chevy/GMC 1500/2500/3500 (All New)
Toyota Tundra
Chevy/GMC Tahoe/Suburban (All New)
Chevy/GMC Trailblazer/Envoy/Bravada
Chevy/GMC Blazer/Jimmy/S-10/Sonoma
Chevy/GMC Colorado/Canyon (US vehicles)
Nissan Titan
Chevy/GMC 1500/2500/3500 (New Body Style)
Chevy/GMC Colorado/Canyon (Canadian vehicles)
Chevy/GMC 1500/2500/3500/Avalanche
Chevy/GMC (Classic Style)
Chevy/GMC Blazer/Jimmy/S-10/Sonoma
Ford Explorer
Jeep
Dodge
Ford
Chevy/GMC
Toyota
International
Chevy/GMC Blazer/Jimmy/S-10/Sonoma
Dodge Dakota
Chevy/GMC C4500/5500
Chevy/GMC Topkick/Kodiak 4500/5500
Dodge
Dodge
Ford
Mazda
Toyota 4Runner
Jeep Liberty
Mitsubishi FG
International
Dodge
Chevy/GMC
Isuzu/Mitsubishi
Jeep Wagoneer
Chevy/GMC
'04–Present
'05–Present
'06–Present
'05–Present
'04–Present
'07–Present
'07–Present
'07–Present
'07–Present
'02–Present
'98–Present
'04–Present
'04–Present
'99–'02
'04–Present
'03–Present
'90–'02
'95–'97
'02–Present
'84–'02
'72–'93
'80–Present
'73–'02
'84–Present
'89–'02
'95–'97
'87–'96
'03–Present
'90–'02
'99–'02
'91–Present
'80–Present
'91–'94, '99–'03
'92–'95
'02–Present
'05–Present
'03–Present
'74–'83
'73–'87
'94–'97
'85–'91
'88–'91
Page
Isolation Module
Kit #
Short
Plug-in
Long
Plug-in
Isolation
Module #
28244
28242
26400
26351
28032
26352
28030
27781
28400
45
42
44
28400, 28027-2,
29420-1
27780, 29458, 28027-2
28028
27480-1
41
42
26400
27480-1 & 28027
8437-1
8437-1 & 28555
27780
26361
8438
26351
26360
27781
26352
28
8438 & 28027
8439
38
26356
26353
27885
n/a
26372
27886
26638
26370
26349
26354
28244
28242
8439 & 26640
8439 & 27968
43
40
39
27890
8443
8442
26400
8436
37
8436 & 28860
8436 & 26640
8436 & 26641
45
28400 & B62225
November 1, 2008
4-PORT ISOLATION MODULE – THEORY OF OPERATION
SNOWPLOW HEADLAMPS
The Isolation Module acts as an
electrical hub, automatically directing
vehicle power to the appropriate
vehicle or snowplow lighting devices,
while also supplying battery power to
the snowplow control.
The vehicle high and low beams
enter and exit the Isolation Module
through positions 3 (left-side lighting)
and position 4 (right-side lighting).
Park, turn and DRL signals also
enter through positions 3 and 4. The
output of the vehicle dimmer switch
is directed to the Isolation Module via
the long and short plug-in harnesses.
Lit. No. 22373, Rev. 07
All snowplow lighting exits the
Isolation Module through position 2.
When the snowplow is not attached
to the vehicle, the signal passes
through the normally closed relay
contacts to the vehicle headlamps.
During this time, the Isolation Module
is inactive, placing no current draw
on the vehicle's electrical system.
With the snowplow attached, the
Isolation Module is still inactive until
either of the two following conditions
are met: The vehicle parking lights
are turned ON or the vehicle ignition
switch is turned ON.
Turning ON the vehicle parking
lights activates a series of relays,
automatically transferring the vehicle
high and low beams to the snowplow
while supplying battery power directly
to the snowplow parking lights.
Turning ON the vehicle ignition
switch energizes a snowplow control
relay, supplying vehicle battery
power directly to the control via the
vehicle control harness. The vehicle
ignition switch also supplies power
to the vehicle turn signals. Activating
the vehicle turn signals energizes
turn signal relays, which supply
vehicle battery power directly to the
snowplow turn signals.
SNOWPLOW DAYTIME
RUNNING LIGHTS
Because Daytime Running Lamps
(DRLs) are controlled differently on
some vehicles, two Isolation Modules
have been developed.
The white Isolation Module transfers
the DRL output from the vehicle
headlamps to the snowplow
headlamps when the vehicle
ignition switch is turned ON and the
snowplow is attached.
The green Isolation Module,
designed for vehicles with dedicated
DRL bulbs, senses the vehicle in the
DRL mode and a series of relays
energize, placing the snowplow
low beams in series. This Isolation
Module does not turn OFF the
vehicle's dedicated DRLs.
November 1, 2008
29
4-PORT ISOLATION MODULE SYSTEM
Side Terminal
Battery
Adapter
Battery Cable
Side
Terminal
Battery
Motor
Relay
Long
Plug-In
Harness
Snowplow
System
Cable
OEM Battery
Cable
To
Cab
Control
Vehicle Battery
Cable
30
Connector
Vehicle Control
Harness
Plow Battery
Cable
Vehicle Lighting
Harness
Dust
Cover
Plow Control
Harness
Plow Lighting
Harness
Motor Relay
Bracket
3
4
Lit. No. 22373, Rev. 07
2
Isolation Module
1
Short
Plug-In
Harness
Configuration
Plug
Motor Relay
Mounting Bracket
November 1, 2008
4-PORT ISOLATION MODULE SYSTEM – ADAPTER KITS
Plug-In
Adapter
w/o Park
3
4
A
Adapter Kit
HB-5 to HB-2
(PN 28860-1)
Long
Plug-In
Harness
Short
Plug-In
Harness
A
Plug-In
Adapter
w/Park
Adapter Kit
2B to 2E
(PN 27968-1)
Adapter Kit
H13 to HB-3/H11
(PN 29420-1)
Female
Extension Harness Kit
Male
(PN 26640)
31
Adapter Kit
A
Adapter Kit
(PN 28555)
E
HB-1
(PN 29056-1)
Adapter Kit
2B/2D
(PN 29234)
Female
Cable Clamp
E
A
Male
Adapter Kit
H13 to LF/UF
(PN B62225-1)
Adapter Kit
HB-5 to 1A/2A
(PN 26641-1)
Lit. No. 22373, Rev. 07
Adapter Kit
HB-5
(PN 29235)
In-Line Adapter
(PN 28027-2)
November 1, 2008
CONFIGURATION PLUG INSTRUCTIONS – 26421
PLUG CONFIGURATION
Headlamp Common = Negative
NOTE: If unsure of headlamp common, configure plug for a negative
common. Complete the installation and check headlamp functions. Turn
on the vehicle lights in the low beam mode. Both low beams should be
on. If the left low beam does not illuminate, change plug configuration to
positive common and test headlamp functions.
Configuration Plug
A
B
C
Cavity
Plug
Wire Side View
Some applications will not use
the configuration plug and will be
supplied with a "Dust Cover".
Secondary
Lock
1. Jumper Position B to Position A
2. Insert cavity plug into Position C
3. Install secondary lock
32
Headlamp Common = Positive
Configuration Plug
Cavity
Plug
A
B
C
Wire Side View
Secondary Lock
1. Jumper Position B to Position C
2. Insert cavity plug into Position A
3. Install secondary lock
To insert terminal or jumper wire into position:
1. Push terminal into correct cavity,
2. Listen for a click. If terminal pulls out, carefully bend
locking tab outward and reinstall terminal.
Lit. No. 22373, Rev. 07
November 1, 2008
4-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
3-PLUG STRAIGHT BLADE SNOWPLOWS (3-PIN)
LOCATED NEAR BATTERY
#6 RED
S3 SOLENOID
LT BLU
SOLENOID
CONTROL
BLK/ORN
12V BATTERY
PLOW ASSEMBLY
MTR RLY (Shown in
de-energized state)
#6 RED
1
#6 BLK
LOCATED UNDER DASH
BLK/ORN
BRN/RED
RED/GRN
S2 SOLENOID
LT GRN
BLK/ORN
LOCATED AT FRONT OF VEHICLE
S1 SOLENOID
WHT/YEL
PUMP MOTOR
- M + #6 BLK/RED
1
1
2
3
LT GRN
4
2
3
LT BLU
9
6
7
8
9
10
11
10
11
#6 BLK 2
#6 BLK/RED 1
2
1
#6 BLK
BLK/ORN
WHT/YEL
RIGHT SIDE PLOW LAMP
RED
T
P
BRN
5
6
7
8
LT BLU
LT GRN
4
5
2
3
RED/YEL 1
LT GRN
2
BLK/ORN
3
BRN/RED
4
LT BLU 5
WHT/YEL
6
4
5
6
WHT
GRN
BRN
BLK
BLU
RED
COIL CORD HARNESS
BLU
1
RED
2
YEL
3
ORN
4
GRN
5
WHT
6
BLK
WHT/YEL
HAND-HELD
CONTROL
RED/GRN
LOCATED AT FRONT OF VEHICLE
BLK/WHT
BLK/ORN
1
1
2
3
4
2
3
H
WHT/YEL
L
WHT
BLU/ORN
5
BLK
6
BLK/ORN
7
GRY
8
PUR
9
BRN
10
LT BLU 11
L
H
4
5
6
7
8
9
10
11
3
3
4
4
TO SWITCHED ACCESSORY LEAD
5
5
6
6
7
7
ISOLATION MODULE
A
RED/YEL
#6 BLK
#6 RED
15-AMP P/T FUSE
RED
BRN
2
2
B
C
D
RED/BLK
E
F
RED/WHT
A
B
C
BLU/RED
BLU/WHT
H
J
K
WHT
BLK
A
CONFIGURATION PLUG
OR DUST COVER PLUG
BLK/WHT
RED
RED/YEL
7.5-AMP CONTROL FUSE
T
P
1
1
A
B
C
BLU
WHT/YEL
WHT
BLU/ORN
BLK/ORN
WHT/YEL
BLK/WHT
PUR
BLK
BLK/ORN
GRY
GRY
BRN
LT BLU
PUR
BRN
LT BLU
BLU/ORN
P
RED
LEFT LOW BEAM IN
LEFT HIGH BEAM IN
YEL
GRN
BRN
P
T
1
From Vehicle
Control Harness
2
From Vehicle
Lighting Harness
3
From Left Side
Vehicle Headlamps
4
From Right Side
Vehicle Headlamps
BLK/ORN
BRN
T
G
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
DRL SIGNAL IN
LEFT TURN IN
PARK LAMP IN
LEFT COMMON IN
RED
LEFT SIDE PLOW LAMP
FOR HB-3/HB-4 HEADLAMPS:
TO VEHICLE HEADLAMPS,
PARK/TURN, DRL, AND
FACTORY VEHICLE HARNESSES
LEFT COMMON OUT
RED
ORN
PNK
PUR
BRN
BLU (or LT BLU)
LT BLU (or BLU)
RIGHT LOW BEAM IN
RIGHT HIGH BEAM IN
YEL
GRN
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RED
ORN
RIGHT TURN IN
PUR
RIGHT COMMON IN
RIGHT COMMON OUT
BLU (or LT BLU)
LT BLU (or BLU)
LEFT LOW BEAM IN
LEFT HIGH BEAM IN
LEFT HIGH BEAM 2 IN **
LEFT HIGH BEAM OUT
A
B
C
D
E
F
G
3
FOR ALL
HEADLAMPS
EXCEPT
HB-3/HB-4:
TO VEHICLE
HEADLAMPS,
PARK/TURN,
AND FACTORY
VEHICLE
HARNESSES
H
J
K
A
B
C
D
E
F
G
H
J
K
LEFT LOW BEAM OUT
LEFT HIGH BEAM 2 OUT**
4
LEFT TURN IN
PARK LAMP IN
LEFT COMMON IN
LEFT COMMON OUT
RIGHT LOW BEAM IN
RIGHT HIGH BEAM IN
RIGHT HIGH BEAM 2 IN**
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT HIGH BEAM 2 OUT**
RIGHT TURN IN
RIGHT COMMON IN
RIGHT COMMON OUT
YEL*
GRN
GRN
RED
ORN
WHT/YEL
PUR
BRN
BLU*
LT BLU
YEL*
GRN
GRN
RED
ORN
WHT/YEL
PUR
BLU*
LT BLU
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
* HB-1 (9004) A= BLUE, J=YELLOW
** 99 DODGE RAM W/ SPORT PACKAGE
Lit. No. 22373, Rev. 07
November 1, 2008
33
4-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
3-PLUG MVP® SNOWPLOWS (7-PIN)
LT BLU/ORN
BLU/ORN
12V BATTERY
BRN/GRN
BLK/WHT
LT GRN
#6 BLK
LT BLU
BLK/ORN
BRN/RED
WHT/YEL
BRN/RED
S2 SOLENOID
RED/YEL
RED/GRN
RED
LOCATED AT FRONT OF VEHICLE
BLK/WHT
RED
S4 SOLENOID
1
1
2
LT BLU
3
LT GRN
4
2
3
5
6
7
BLU/ORN
8
WHT/YEL
9
LT BLU/ORN
10
11
RED
S5 SOLENOID
S6 SOLENOID
PUMP MOTOR
-
M
BLK/ORN
BRN/GRN
S3 SOLENOID
+ #6 BLK/RED
COIL CORD HARNESS
1
2
4
5
6
7
8
9
10
11
1
2
BLK/WHT
LT BLU
LT GRN
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
F2
F1
TO SWITCHED ACCESSORY LEAD
BLU/ORN
WHT/YEL
A
LT BLU/ORN
#6 BLK
#6 RED
RED/GRN
15-AMP P/T FUSE
10-AMP CONTROL FUSE
LOCATED AT FRONT OF VEHICLE
BLK/WHT
BLK/ORN
WHT/YEL
RIGHT SIDE PLOW LAMP
1
1
2
3
4
2
3
WHT
BLU/ORN
5
BLK
6
BLK/ORN
7
GRY
8
PUR
9
BRN
10
LT BLU 11
RED
T
BRN
RED
T
P
YEL
VIO
GRY
WHT
ORN
BLU
GRN
RED
TAN
BRN
BLK
RED/YEL
#6 BLK
P
HAND-HELD
CONTROL
(Shown in
MTR RLY de-energized state)
#6 RED
#6 RED
PLOW ASSEMBLY
S1 SOLENOID
LOCATED UNDER DASH
LOCATED NEAR BATTERY
BRN
4
5
6
7
8
9
10
11
CONFIGURATION PLUG
OR DUST COVER PLUG
BLK/WHT
BLK/ORN
A
B
C
A
B
C
RED
RED/YEL
B
C
D
RED/BLK
E
F
RED/WHT
BLU
BLU/RED
DK BLU/WHT
WHT/YEL
WHT
BLU/ORN
WHT
BLK
BLK/ORG
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
GRY
PUR
BRN
LT BLU
LT BLU
BLU/ORG
LEFT LOW BEAM IN
LEFT HIGH BEAM IN
H
L
LEFT HIGH BEAM OUT
RED
LEFT LOW BEAM OUT
ORN
DRL SIGNAL IN
PNK
PUR
BRN
L
LEFT TURN IN
H
PARK LAMP IN
LEFT COMMON IN
BRN
P
T
RED
FOR HB-3/HB-4 HEADLAMPS:
TO VEHICLE HEADLAMPS,
PARK/TURN, DRL, AND
FACTORY VEHICLE HARNESSES
YEL
GRN
LEFT COMMON OUT
RIGHT LOW BEAM IN
RIGHT HIGH BEAM IN
T
RED
LEFT SIDE PLOW LAMP
E
F
G
H
J
K
YEL
GRN
A
RED
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
ORN
RIGHT TURN IN
PUR
RIGHT COMMON IN
RIGHT COMMON OUT
B
C
D
BLU (or LT BLU)
LT BLU (or BLU)
BRN
P
A
B
C
D
E
F
G
H
BLU (or LT BLU) J
LT BLU (or BLU) K
3
FOR ALL
HEADLAMPS
EXCEPT
HB-3/HB-4:
TO VEHICLE
HEADLAMPS,
PARK/TURN,
AND FACTORY
VEHICLE
HARNESSES
4
LEFT LOW BEAM IN
LEFT HIGH BEAM IN
LEFT HIGH BEAM 2 IN **
LEFT HIGH BEAM OUT
LEFT LOW BEAM OUT
LEFT HIGH BEAM 2 OUT**
LEFT TURN IN
PARK LAMP IN
LEFT COMMON IN
LEFT COMMON OUT
RIGHT LOW BEAM IN
RIGHT HIGH BEAM IN
RIGHT HIGH BEAM 2 IN**
RIGHT HIGH BEAM OUT
RIGHT LOW BEAM OUT
RIGHT HIGH BEAM 2 OUT**
RIGHT TURN IN
RIGHT COMMON IN
RIGHT COMMON OUT
YEL*
GRN
GRN
RED
ORG
WHT/YEL
PUR
BRN
BLU*
LT BLU
YEL*
GRN
GRN
RED
ORG
WHT/YEL
PUR
BLU*
LT BLU
G
1
From Vehicle
Control Harness
H
J
K
34
A
B
C
D
E
F
G
2
From Vehicle
Lighting Harness
3
From Left Side
Vehicle Headlamps
4
From Right Side
Vehicle Headlamps
H
J
K
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
* HB-1 (9004) A= BLUE, J=YELLOW
** 99–02 DODGE RAM W/ SPORT PACKAGE
Lit. No. 22373, Rev. 07
November 1, 2008
4-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
2-PLUG MVP PLUS™ SNOWPLOWS
Snowplow Assembly
BLK
Motor
Relay
BLK
A
S1
WHT
S2
GRN
S3
BLU
RED
RED
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
B
RED
S8
GRY
S9
WHT
S10
GRN
S11
ORN
S7
BRN
4 Amp Fuse: S4, S5, S6, S7
4 Amp Fuse: S8, S9, S10, S11
A
B
C
D
E
F
G
H
J
K
RED
S6
YEL
S5
BLK
S4
TAN
D
C
B
A
4 Amp Fuse: S1, S2, S3
4 Amp Fuse: Motor Relay
BLK
RED
A
B
C
D
E
F
G
H
J
K
1 – Red (Control Power)
2 – Red (Twisted with #3)
3 – Black (Twisted with #2)
4 – Black (Control Ground)
+
Battery
RED
TAN
WHT
RED
RED
A
B
C
D
E
F
G
H
J
K
TAN
BLK
–
A
B
C
D
E
F
G
H
J
K
WHT
+
RED
RED
RED
Pump –
Motor
Vehicle Battery Cable, 4 Receptacle
BLK
D
C
B
A
4
3
3
4
2
1
1
2
Vehicle Control Harness, 4 Wire
BLK
RED
RED
BLK
RED
RED
BLK
BLK
CAUTION
A BCD
Port #1 Adapter
RED/GRN
C
BLK/ORN
7.5 Amp
Control
Fuse
HIGH-3C
COM-5B
LOW-1A
Driver-Side Plow Headlamp
C
B
A
HIGH
LOW
BEAM
TURN
PARK
C
B
A
DS LOW BEAM IN
DS HIGH BEAM IN
TURN-9B
COM
C
B
A
HIGH
LOW
BEAM
HIGH-4C
COM-11B
LOW-6A
PARK
TURN-8B
COM
Lit. No. 22373, Rev. 07
Located at Front of Vehicle
LOW-1A
COM
HIGH-3C
HIGH-4C
COM-5B
LOW-6A
COM
TURN-8B
TURN-9B
PARK
COM-11B
1
2
3
4
5
6
7
8
9
10
11
Snowplow
Lighting
Harness,
11 Pin
1
2
3
4
5
6
7
8
9
10
11
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
Vehicle
Lighting
Harness,
11 Pin
1 RED
2 GRN
3 WHT
4 BLK
To Switched Accessory Lead
RED
A BCD
PARK
C
B
A
1
2
3
4
4-Pin Plug
(Under Dash)
For HB-3/HB-4
Headlamps:
To Vehicle
Headlamps,
Park/Turn, DRL
and Factory
Vehicle
Harnesses
DS HIGH BEAM OUT
DS LOW BEAM OUT
DRL SIGNAL IN
DS TURN IN
PARK LAMP IN
DS COMMON IN
DS COMMON OUT
PS LOW BEAM IN
PS HIGH BEAM IN
PS HIGH BEAM OUT
PS LOW BEAM OUT
PS TURN IN
PS COMMON IN
PS COMMON OUT
A
B
C
D
E
RED/BLK
F
RED/WHT G
BLU
H
DKBLU/RED J
DKBLU/WHT K
RED
RED/YEL
15 Amp
Park/Turn
Fuse
Configuration
Plug or
Dust Cover
A A
B B
C C
A
B
C
RED D
ORG E
PNK
F
PUR G
BRN H
LTBLU J
K
BLU
YEL
GRN
3
YEL
GRN
A
B
C
RED D
ORG E
F
PUR G
H
LTBLU J
K
BLU
4
For All
Headlamps
Except
HB-3/HB-4:
To Vehicle
Headlamps,
Park/Turn
and Factory
Vehicle
Harnesses
1
From Vehicle
Control
Harness
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
2
From Vehicle
Lighting
Harness
DS LOW BEAM IN
DS HIGH BEAM IN
DS HIGH BEAM NO.2 IN**
DS HIGH BEAM OUT
DS LOW BEAM OUT
DS LOW BEAM NO.2 OUT**
DS TURN IN
PARK LAMP IN
DS COMMON IN
DS COMMON OUT
YEL*
GRN
GRN
RED
ORG
WHT/YEL
PUR
BRN
BLU*
LTBLU
A
B
C
D
E
F
G
H
J
K
3
From DS
Vehicle
Headlamps
PS LOW BEAM IN
PS HIGH BEAM IN
PS HIGH BEAM NO.2 IN**
PS HIGH BEAM OUT
PS LOW BEAM OUT
PS LOW BEAM NO.2 OUT**
PS TURN IN
YEL*
GRN
WHT
RED
ORG
WHT/YEL
PUR
A
B
C
D
E
F
G
H
J
K
4
From PS
Vehicle
Headlamps
Passenger-Side Plow Headlamp
PARK
TURN
Control
(connector face view)
On 2-plug electrical systems, plug covers shall
be used whenever snowplow is disconnected.
Vehicle Battery Cable is 12-volt unfused source.
Plow Module
1 – Red
2 – Green
3 – White
4 – Black
PS COMMON IN
PS COMMON OUT
* HB-1(9004) A=BLUE, J=YELLOW)
** 99 DODGE RAM W/SPORT PACKAGE
BLU*
LTBLU
Isolation Module
November 1, 2008
35
4-PORT ISOLATION MODULE – ELECTRICAL SCHEMATIC
2-PLUG WIDE-OUT™ SNOWPLOWS
Snowplow Assembly
Vehicle Battery Cable, 4 Receptacle
RED
Pump –
Motor
BLK
Motor
Relay
A
D
C
B
A
4 Amp Fuse: Sense
4 Amp Fuse: S1, S2,
Motor Relay
BLK
RED
RED
S2
DKGRN
S1
WHT
RED
A
B
C
D
E
F
G
H
J
K
A
B
C
D
E
F
G
H
J
K
B
1 – Red (Control Power)
2 – Red (Twisted with #3)
3 – Black (Twisted with #2)
4 – Black (Control Ground)
+
Battery
RED
+
RED
A
B
C
D
E
F
G
H
J
K
TAN
BLK
A
B
TAN C
WHT D
E
RED F
G
H
J
BLK K
WHT
–
D
C
B
A
Vehicle Control Harness, 4 Wire
BLK
RED
RED
BLK
S9
WHT
S10
DKBLU
RED
S8
GRY
S7
BRN
S6
YEL
S5
BLK
A
B
C
D
E
F
G
H
J
K
3
4
1
1
2
RED
RED
BLK
BLK
CAUTION
On 2-plug electrical systems, plug covers shall
be used whenever snowplow is disconnected.
Vehicle Battery Cable is 12-volt unfused source.
C
BLK/ORN
7.5 Amp
Control
Fuse
TURN-9B
COM
HIGH-3C
COM-5B
LOW-1A
Driver-Side Plow Headlamp
C
B
A
HIGH
LOW
BEAM
TURN
PARK
C
B
A
DS LOW BEAM IN
DS HIGH BEAM IN
PARK
C
B
A
HIGH
LOW
BEAM
HIGH-4C
COM-11B
LOW-6A
PARK
TURN-8B
COM
Lit. No. 22373, Rev. 07
Located at Front of Vehicle
LOW-1A
COM
HIGH-3C
HIGH-4C
COM-5B
LOW-6A
COM
TURN-8B
TURN-9B
PARK
COM-11B
1
2
3
4
5
6
7
8
9
10
11
Snowplow
Lighting
Harness,
11 Pin
1
2
3
4
5
6
7
8
9
10
11
BLK/WHT
BLK/ORN
WHT/YEL
WHT
BLU/ORN
BLK
BLK/ORN
GRY
PUR
BRN
LTBLU
Vehicle
Lighting
Harness,
11 Pin
1
2
3
4
1 RED
2 GRN
3 WHT
4 BLK
A BCD
A BCD
Plow Module
C
B
A
Control
To Switched Accessory Lead
RED
Port #1 Adapter
For HB-3/HB-4
Headlamps:
To Vehicle
Headlamps,
Park/Turn, DRL
and Factory
Vehicle
Harnesses
DS HIGH BEAM OUT
DS LOW BEAM OUT
DRL SIGNAL IN
DS TURN IN
PARK LAMP IN
DS COMMON IN
DS COMMON OUT
PS LOW BEAM IN
PS HIGH BEAM IN
PS HIGH BEAM OUT
PS LOW BEAM OUT
PS TURN IN
PS COMMON IN
PS COMMON OUT
A
B
C
D
E
RED/BLK
F
RED/WHT G
BLU
H
DKBLU/RED J
DKBLU/WHT K
RED
RED/YEL
15 Amp
Park/Turn
Fuse
Configuration
Plug or
Dust Cover
A A
B B
C C
A
B
C
RED D
ORG E
PNK
F
PUR G
BRN H
LTBLU J
K
BLU
YEL
GRN
3
YEL
GRN
A
B
C
RED D
ORG E
F
PUR G
H
LTBLU J
K
BLU
4
For All
Headlamps
Except
HB-3/HB-4:
To Vehicle
Headlamps,
Park/Turn
and Factory
Vehicle
Harnesses
1
From Vehicle
Control
Harness
WHT
BLK
BLK/ORN
WHT/YEL
BLK/WHT
PUR
GRY
BRN
LTBLU
BLU/ORN
A
B
C
D
E
F
G
H
J
K
2
From Vehicle
Lighting
Harness
DS LOW BEAM IN
DS HIGH BEAM IN
DS HIGH BEAM NO.2 IN**
DS HIGH BEAM OUT
DS LOW BEAM OUT
DS LOW BEAM NO.2 OUT**
DS TURN IN
PARK LAMP IN
DS COMMON IN
DS COMMON OUT
YEL*
GRN
GRN
RED
ORG
WHT/YEL
PUR
BRN
BLU*
LTBLU
A
B
C
D
E
F
G
H
J
K
3
From DS
Vehicle
Headlamps
PS LOW BEAM IN
PS HIGH BEAM IN
PS HIGH BEAM NO.2 IN**
PS HIGH BEAM OUT
PS LOW BEAM OUT
PS LOW BEAM NO.2 OUT**
PS TURN IN
YEL*
GRN
WHT
RED
ORG
WHT/YEL
PUR
A
B
C
D
E
F
G
H
J
K
4
From PS
Vehicle
Headlamps
Passenger-Side Plow Headlamp
PARK
TURN
1 – Red
2 – Green
3 – White
4 – Black
4-Pin Plug
(Under Dash)
RED/GRN
A
B
C
D
E
F
G
H
J
K
3
2
(connector face view)
4 Amp Fuse: S5, S6, S7, S8
4 Amp Fuse: S9, S10
RED
4
PS COMMON IN
PS COMMON OUT
* HB-1(9004) A=BLUE, J=YELLOW)
** 99 DODGE RAM W/SPORT PACKAGE
BLU*
LTBLU
Isolation Module
November 1, 2008
36
HEADLAMP WIRING – 8436 HARNESS KIT (HB-1 OR HB-5) (1A/2A1)
Harness Part #26349
Harness Part #26354
Plugs for Harnesses
#26349 and #26354
Location
Wire Color
Black Molded Female Plug
1
GREEN
2
BLUE
3
YELLOW
Black Molded Female Plug
Location
Wire Color
Black Molded Female Plug
1
GREEN
2
BLUE
3
YELLOW
Blue Male Plug
Blue Male Plug
A
B
C
* HB-1
Loose
Loose
LT BLUE* / ORANGE**
ORANGE* / LT BLUE**
RED
** HB-5
Blue Male Plug
Splice Tap Wires
PURPLE
BROWN
A
B
C
* HB-1
Loose
LT BLUE* / ORANGE**
ORANGE* / LT BLUE**
RED
** HB-5
Splice Tap Wires
PURPLE
10-Position Plug
10-Position Plug
A
B
C
D
E
F
G
H
J
K
BLUE* / YELLOW**
GREEN
—
RED
ORANGE
—
PURPLE
BROWN
YELLOW* / BLUE**
LT BLUE
10-Position Plug for
Harnesses #26349 and #26354
1
Lit. No. 22373, Rev. 07
A
B
C
D
E
F
G
H
J
K
BLUE* / YELLOW**
GREEN
—
RED
ORANGE
—
PURPLE
—
YELLOW* / BLUE**
LT BLUE
Not shown. Requires adapter kit 26641.
November 1, 2008
37
HEADLAMP WIRING – 8439 HARNESS KIT (2B/2D) (2E1)
Harness Part #26353
Location
A
B
C
Wire Color
Female Plug
LT BLUE
ORANGE
RED
A
B
C
Male Plug
GREEN
YELLOW
BLUE
Loose
Splice Tap Wires
PURPLE
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
—
BLUE
LT BLUE
Harness Part #26356
Plugs for Harnesses
#26353 and #26356
Female Plug
Male Plug
10-Position Plug for
Harnesses #26353 and #26356
1
Lit. No. 22373, Rev. 07
Location
A
B
C
Wire Color
Female Plug
ORANGE
LT BLUE
RED
A
B
C
Male Plug
YELLOW
BLUE
GREEN
Loose
Loose
Splice Tap Wires
PURPLE
BROWN
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
BROWN
BLUE
LT BLUE
Not shown. Requires adapter kit 27698.
November 1, 2008
38
HEADLAMP WIRING – 8442 HARNESS KIT (HB-1/HB-5 QUAD)
Harness Part #26370
Location
Wire Color
Black Molded Female Plug (3 Wire)
1
GREEN
2
BLUE
3
YELLOW
A
B
C
Blue Male Plug
ORANGE
LT BLUE
RED
Black Molded Plug (2 Wire)
1
GREEN
2
—
3
YELLOW
Blue Female Plug (2 Wire)
A
YELLOW
B
—
C
WHITE / YELLOW
Loose
A
B
C
D
E
F
G
H
J
K
Plugs for Harness #26370 & #26372
Black Molded Female Plug (3 Wire)
Blue Male Plug
Black Molded Plug (2 Wire)
Blue Female Plug (2 Wire)
Splice Tap Wires
PURPLE
10-Position Plug
YELLOW
GREEN
GREEN
RED
ORANGE
WHITE / YELLOW
PURPLE
—
BLUE
LT BLUE
Lit. No. 22373, Rev. 07
Harness Part #26372
Location
Black Molded Female Plug (3 Wire)
1
GREEN
2
BLUE
3
YELLOW
A
B
C
Blue Male Plug
ORANGE
LT BLUE
RED
Black Molded Plug (2 Wire)
1
GREEN
2
—
3
YELLOW
Blue Female Plug (2 Wire)
A
YELLOW
B
—
C
WHITE / YELLOW
Loose
Loose
10-Position Plug
for Harness #26370 & #26372
Wire Color
A
B
C
D
E
F
G
H
J
K
Splice Tap Wires
BROWN
PURPLE
10-Position Plug
YELLOW
GREEN
GREEN
RED
ORANGE
WHITE / YELLOW
PURPLE
BROWN
BLUE
LT BLUE
November 1, 2008
39
HEADLAMP WIRING – 8443 HARNESS KIT (2B/2D)
Harness Part #26638
Location
Wire Color
7-Pin Female Plug
A
BROWN
B
YELLOW
C
PURPLE
D
PURPLE
E
GREEN
F
—
G
BLACK / ORANGE
A
B
C
D
E
F
G
7-Pin Male Plug
BROWN
ORANGE
PURPLE
PURPLE
RED
—
BLACK / ORANGE
10-Position Plug (Tag #3)
A
YELLOW
B
GREEN
C
—
D
RED
E
ORANGE
F
—
G
PURPLE
H
—
J
BLUE
K
LT BLUE
Lit. No. 22373, Rev. 07
Plugs for Harness #26638
7-Pin Female Plug
7-Pin Male Plug
10-Position Plug (Tag #3)
for Harness #26638
40
Harness Part #26638
10-Position Plug (Tag #4)
for Harness #26638
Location
Wire Color
10-Position Plug (Tag #4)
A
YELLOW
B
GREEN
C
—
D
—
E
—
F
—
G
PURPLE
H
BROWN
J
—
K
LT BLUE
November 1, 2008
HEADLAMP WIRING – 27480-1/8437-1 HARNESS KITS (HB-3/HB-4)
Harness Part #26360
Location
Wire Color
2-Key Female Plug
A
LT BLUE
B
GREEN
A
B
2-Key Male Plug
BLUE
RED
A
B
1-Key Female Plug
BLUE
YELLOW
A
B
1-Key Male Plug
BLUE
ORANGE
Loose
Splice Tap Wires
PURPLE
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
—
LT BLUE
BLUE
Plugs for Harnesses
#26360 & #26361
2-Key Female Plug
2-Key Male Plug
Harness Part #26361
Location
Wire Color
2-Key Female Plug
A
LT BLUE
B
GREEN
A
B
2-Key Male Plug
BLUE
RED
A
B
1-Key Female Plug
BLUE
YELLOW
A
B
1-Key Male Plug
BLUE
ORANGE
Loose
Loose
Loose
Splice Tap Wires
BROWN
PURPLE
PINK*
1-Key Female Plug
1-Key Male Plug
10-Position Plug for
Harnesses #26360 & #26361
A
B
C
D
E
F
G
H
J
K
10-Position Plug "B"
YELLOW
GREEN
—
RED
ORANGE
PINK
PURPLE
BROWN
LT BLUE
BLUE
* Pink wire not used on 27480.
Lit. No. 22373, Rev. 07
November 1, 2008
41
HEADLAMP WIRING – 27780/8438 HARNESS KITS (HB-3/HB-4)
Harness Part #26351
Location
Wire Color
2-Key Female Plug
A
GREEN
B
BLUE
A
B
2-Key Male Plug
RED
LT BLUE
A
B
1-Key Female Plug
YELLOW
BLUE
A
B
1-Key Male Plug
ORANGE
BLUE
Loose
Loose
Loose
Splice Tap Wires
PURPLE
BROWN
PINK*
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
PINK
PURPLE
BROWN
BLUE
LT BLUE
Plugs for Harnesses
#26351 & #26352
2-Key Female Plug
2-Key Male Plug
Harness Part #26352
Location
Wire Color
2-Key Female Plug
A
GREEN
B
BLUE
A
B
2-Key Male Plug
RED
LT BLUE
A
B
1-Key Female Plug
YELLOW
BLUE
A
B
1-Key Male Plug
ORANGE
BLUE
Loose
Splice Tap Wires
PURPLE
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
—
BLUE
LT BLUE
1-Key Female Plug
1-Key Male Plug
10-Position Plug for
Harnesses #26351 & #26352
* Pink wire not used on 8438.
Lit. No. 22373, Rev. 07
November 1, 2008
42
HEADLAMP WIRING – 27890 HARNESS KIT (2B/2D OR 1A/2A)
Harness Part #27885
Location
A
B
C
D
E
* Rev. 0
A
B
C
D
E
Wire Color
Female Plug
YELLOW* / GREEN**
GREEN* / YELLOW**
BLUE
PURPLE
BROWN
** Rev. 1
Male Plug
RED
ORANGE
LT BLUE
PURPLE
BROWN
10-Position Plug
GREEN*
YELLOW**
B
YELLOW*
GREEN**
C
—
D
RED
E
ORANGE
F
—
G
PURPLE
H
BROWN
J
BLUE
K
LT BLUE
* Rev. 0 ** Rev. 1
Harness Part #27886
Plugs for Harnesses
#27885 and #27886
Female Plug
Male Plug
A
Lit. No. 22373, Rev. 07
Location
A
B
C
D
E
* Rev. 0
A
B
C
D
E
Wire Color
Female Plug
YELLOW* / GREEN**
GREEN* / YELLOW**
BLUE
PURPLE
BROWN
** Rev. 1
Male Plug
RED
ORANGE
LT BLUE
PURPLE
BROWN
10-Position Plug
GREEN*
YELLOW**
B
YELLOW*
GREEN**
C
—
D
RED
E
ORANGE
F
—
G
PURPLE
H
—
J
BLUE
K
LT BLUE
* Rev. 0 ** Rev. 1
A
10-Position Plug for
Harnesses #27885 and #27886
November 1, 2008
43
HEADLAMP WIRING – 28028 HARNESS KIT (HB-3/HB-4)
Harness Part #28030
Location
A
B
C
D
Wire Color
Female Plug
GREEN
YELLOW
LT BLUE
BLUE
A
B
C
D
Male Plug
RED
ORANGE
BLUE
BLUE
Loose
Splice Tap Wires
PURPLE
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
—
LT BLUE
BLUE
Lit. No. 22373, Rev. 07
Harness Part #28032
Plugs for Harnesses
#28030 and #28032
Female Plug
Male Plug
10-Position Plug for
Harnesses #28030 and #28032
Location
A
B
C
D
Wire Color
Female Plug
GREEN
YELLOW
LT BLUE
BLUE
A
B
C
D
Male Plug
RED
ORANGE
BLUE
BLUE
Loose
Loose
Splice Tap Wires
PURPLE
BROWN
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
BROWN
LT BLUE
BLUE
November 1, 2008
44
HEADLAMP WIRING – 28400 HARNESS KIT (H13)
Harness Part #28242*
Location
A
B
C
Wire Color
Female Plug
ORANGE
LT BLUE
RED
A
B
C
Male Plug
YELLOW
BLUE
GREEN
Harness Part #28244*
Plugs for Harnesses
#28242 and #28244
Female Plug
Location
A
B
C
Wire Color
Female Plug
ORANGE
LT BLUE
RED
A
B
C
Male Plug
YELLOW
BLUE
GREEN
Male Plug
Loose
Splice Tap Wires
PURPLE
Loose
Loose
*Rev. 3 and Higher
Splice Tap Wires
PURPLE
BROWN
*Rev. 3 and Higher
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
—
BLUE
LT BLUE
Lit. No. 22373, Rev. 07
10-Position Plug for
Harnesses #28242 and #28244
A
B
C
D
E
F
G
H
J
K
10-Position Plug
YELLOW
GREEN
—
RED
ORANGE
—
PURPLE
BROWN
BLUE
LT BLUE
November 1, 2008
45
This page intentionally left blank.
46
Lit. No. 22373, Rev. 07
November 1, 2008
RELAY SYSTEM – HEADLAMP INDEX
Vehicle(s)
Headlamp
Headlamp
Page
DRLs
No.
Type
Harness Part #
Chevrolet-GMC
'03
HB-3/HB-4
64075
Yes
86
Year(s)
Silverado
Silverado, Sierra
'99–'02
(Low Side Drive System)
GM C4500, 5500
'03
S10/S15 Blazer, Jimmy and
'98
Pickup
All (except S10/S15 Blazer,
'98
Jimmy, and Pickup)
K1500, K2500, K3500, C2500,
C3500 Pickups/Chassis Cabs, '96,'97
Blazer, Jimmy, Tahoe, Yukon
HB-3/HB-4
26071
Yes
66
2B, 1A/2A**
64126
Yes
59
HB-3/HB-4
62914
Yes
80
2B
HB-3/HB-4
2B
61546
61716
61546
Yes
Yes
Yes
59
60
59
HB-3/HB-4
61716
Yes
60
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
56
77
61
78
57
77
56
78
57
77
56
78
57
79
57
2B
S10/S15 Blazer, Jimmy
and Pickup; Sonoma
'83–'97
Suburban, Blazer, Jimmy,
Tahoe, Yukon
'92–'95
K2500, K3500, K3500 HD
Chassis Cabs
'90–'95
61546
62536*
2E
61576
61586
HB-3/HB-4
61716
61556
2B
61546
61586
HB-3/HB-4
61716
61556
2B
61546
61586
HB-3/HB-4
61716
61581 modified
LF/UF
61581
Headlamp
Headlamp
Page
DRLs
No.
Type
Harness Part #
Chevrolet-GMC
61556
Yes
77
2B
61546
No
56
61586
Yes
78
K1500, K2500, K3500, C2500,
'88–'95
HB3/HB4
C3500 Pickups
61716
No
57
61581 modified Yes
79
LF/UF
61581
No
57
1A/2A
61566
No
58
K2500, K3500, K3500 HD,
'81–'89
61556
Yes
77
R20 2WD Chassis Cabs
2B
61546
No
56
1A/2A
61566
No
58
61556
Yes
77
2B
Suburban, Blazer, Jimmy, R30
'81–'91
61546
No
56
2WD, V30 4x4
61581 modified Yes
79
LF/UF
61581
No
57
1A/2A
61566
No
58
K1500, K2500, K3500, C2500,
'81–'87
61556
Yes
77
C3500, V10, V20 Pickups
2B
61546
No
56
Jeep
61731
Yes
62
2B
Cherokee, Wagoneer, Pioneer '84–'01
61731
No
61
LF/UF
61581
No
57
Wrangler
'86–'03
Yes
62
2B
61731
Comanche
'86–'93
No
61
Vehicle(s)
Year(s)
* Early GM applications used 61576 and 61556 harnesses spliced together.
** DRL kit not required. Refer to relay connections only.
See Isolation Module Section for 2004 and newer applications.
Lit. No. 22373, Rev. 07
November 1, 2008
47
RELAY SYSTEM – HEADLAMP INDEX
Headlamp
Headlamp
Page
DRLs
No.
Type
Harness Part #
Dodge
No
61
HB-1
62526
Yes
62
No
56
Dakota 4x4
'87–'98
HB-5
61591
Yes
59
No
61
2E
61576
Yes
62
Dakota
'01–'03
No
67
63413
HB-5
Rev 1–3
Durango
'01–'03
Yes
70
Yes
82
Dakota/Durango
'99–'00
HB-5
26027
(Low Side Drive System)
No
64
26009
Yes
81
HB-1
Ram 1500 ('99–'01)
26009
No
63
Ram 2500, 3500
'99–'02
26027
Yes
83
(Low Side Drive)
HB-1/HB-5
26027
No
65
No
61
W100/150/200/250/300/350/
2B/2D
61731
350 4x4; RamCharger/
'72–'93
Yes
62
TrailDuster 4x4
1A/2A
61566
No
58
No
61
Ram 1500, 2500, 3500 Pickup
'94–'98
HB-1
62526
& Chassis Cab 4x2/4x4
Yes
62
No
68
Ram 1500
63413
'02
HB-5
REV 3 only
Rev 3 only
Yes
69
No
84
63413
Ram 1500/2500/3500
'03
HB-5
Rev 3 & Higher Yes
85
Vehicle(s)
Year(s)
See Isolation Module Section for 2004 and newer applications.
Lit. No. 22373, Rev. 07
Vehicle(s)
F-150/250/350/
Super Duty HD/4x2/4x4
F-150 ('97–Present)
F-250 LD ('97–'98)
'99 Super Duty Series
F-250HD/350/450/550
Bronco II ('83–'90),
Bronco Full Size ('80–'93),
Ranger ('83–'96),
B4000 Mazda ('94),
Explorer/Navajo (Mazda)
('91–'94) (HB-1 only)
4-Runner 4x4
Tacoma Pickup 4x4
Pickup 4x4
Headlamp
Headlamp
Page
DRLs
No.
Type
Harness Part #
Ford (Mazda)
No
56
HB-1
61571
Yes
59
'80–'91
No
56
2B
61546
Yes
59
No
56
'92–'98
HB-5
61591
Yes
59
No
56
HB-5
61591
Yes
59
'99–'03
No
56
2B
61546
Yes
59
No
56
HB-5
61591
Yes
59
No
56
'80–'96
HB-1
61571
Yes
59
No
56
2B
61546
Yes
59
Toyota
No
76
HB-1
61571 (Qty 2)
Yes
74
'84–'95
61556
No
75
2B
61546 (Qty 2)
Yes
74
61556
No
75
'95–'03
2B
61556
Yes
77
61556
No
75
'84–'95
2B
61546 (Qty 2)
Yes
74
Year(s)
November 1, 2008
48
RELAY SYSTEM – ELECTRICAL CONNECTORS
Harness Connectors – Relay System
Plow (end view)
Headlamp Relay
Terminal Locations
87A
7
8
9
10
11
12
(pins)
87
86
Straight Blade Control Connectors
1
2
3
4
5
6
85
30
Vehicle (end view)
1
2
3
4
5
a
Left and Right Sides.
7-Pin System—Main Ground.
c
8
9
10
11
12
Wire Color
Control Function
7-Pin
9-Pin
12-Pin
—
White/Yellow
White/Yellow
Valve S1(2W)
a
a
Black
Black
Black
Low Beam 9/12-Pin Rt
—
Lt Green
Lt Green
Valve S2(3W)
—
Lt Blue
Lt Blue
Valve S3(4W)
Black/Orangec Black/Orangec,d Black/Orangec,d
Ground
White
White
White
High Beam
—
—
Black/White
Low Beam 12-Pin Lt
—
—
Dk Blue/Orange Gnd Low Beam 12-Pin Rt
Gray
Gray
Gray
Left Directional
Purple
Purple
Purple
Right Directional
Brown
Brown
Brown
Parking Lights
Orange/Blackb
—
Lt Blue/Orange Gnd Low Beam 12-Pin Lt
b
3
5
2
4
1
Pin #
1
2
3
4
5
6
Wire Color
White
Green
Brown
Black
Blue
Red
3
7
11
14
Vehicle Side
(end view)
7
1
2
3
4
5
6
7
8
9
10
11
12
6
(pins)
6
(sockets)
Pin #
Control Side
(end view)
NOTE: The 7-, 9- and
12-pin harness connector
pin #s are embossed in
the molded plug.
MVP® Blade Connectors
3
6
2
5
1
4
1
2
3
4
5
6
4
8
12
(Front View)
(sockets)
Pin #
1
Control
Function
Red
+12V
Lt Green
S2 (3W)
Orange/Black
Ground
Brown/Red Motor Relay
Lt Blue
S3 (4W)
White/Yellow
S1 (2W)
Wire Color
Pin #
1
2
3
4
5
6
7
8
9
10
Wire Color
Lt Blue w/Orange Stripe
Blue w/Orange Stripe
Black w/White Stripe
Lt Green
Lt Blue
White w/Yellow Stripe
Brown w/Red Stripe
Red
Orange w/Black Stripe
Brown w/Green Stripe
MVP Blade to Straight Blade
Adapter Kit PN 66760K
d
On Early Revision Harnesses, Black/Orange Wire
is Ground for Motor Relay, Control and Headlight
Relays.
Ground for Headlight Relays Only.
Lit. No. 22373, Rev. 07
November 1, 2008
49
7-PIN HARNESS
PLOW SIDE
HEADLAMP KIT:
7 PIN
BLK/ORN
BRN
T
P
RED
BLK/ORN
BRN
RIGHT SIDE
LAMPS
WHT
H
BRN
BLK/ORN
PUR
RED
T
P
BLK/ORN
BLK
L
BLK
BLK/ORN
(GROUND)
LEFT SIDE
LAMPS
13775-90
13775-95
Lit. No. 22373, Rev. 07
P
BRN
BLK/ORN
T
RED
P
BRN
BLK/ORN
RED
T
LOCATED AT
FRONT OF VEHICLE
GRY
H
BRN
BLK/ORN
BLK
(LOW BEAM)
BLK
BLKORN
WHT
50
4
BLK/ORN
5
WHT
6
7
8
GRY
9
PUR
10
BRN
11
ORN/BLK
12
WHT (HIGH BEAM)
L
1
2
3
November 1, 2008
7-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
86
87A
PUR
P
85
H
RED
BLU
L
ORN
NO
For other headlamp configurations using
the 7-pin harness, use the appropriate
9-pin vehicle schematic.
ORN/BLK
ORN
BLU
RED
BRN
GRY
13775-95
P
T
HB1/HB5
51
LOCATED AT
FRONT OF VEHICLE
H
A
PUR
1
BLK
2
3
4
BLK/ORN
5
WHT
6
7
8
GRY
9
PUR
10
BRN
11
ORN/BLK
12
L
HARNESS TYPE:
DRLs:
PUR
30
7 PIN
HEADLAMPS:
T
87
HEADLAMP KIT:
ORN 87A
BLK 87
30
YEL
BRN 86
85
BLK/ORN
RED 87A
WHT 87
30
GRN
BRN 86
85
BLK/ORN
LOW BEAM
RELAY
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
7-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
PUR
P
85
30
H
RED
BLU
L
ORN
1
2
3
4
5
6
7
8
HB1/HB5
YES
For other headlamp configurations using
the 7-pin harness, use the appropriate
9-pin vehicle schematic.
BLK
PNK
DRL KIT WIRE
3AG5
PNK
LOCATED UNDER DASH
BLK/ORN
WHT
52
GRY
9
PUR
10
BRN
11
ORN/BLK
12
ORN/BLK
LOCATED AT
FRONT OF VEHICLE
L
ORN
BLU
H
RED
BRN
GRY
13775-95
A
DRLs:
PUR
BROWN WIRES
NOT USED
ON DRL VEHICLES
P
T
HARNESS TYPE:
PUR
86
87A
7 PIN
HEADLAMPS:
T
87
HEADLAMP KIT:
ORN 87A
BLK 87
30 YEL
PNK 86
85 BLK/ORN
RED 87A
WHT 87
30 GRN
PNK 86
85 BLK/ORN
LOW BEAM
RELAY
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
ELECTRICAL SCHEMATIC – 9-PIN VEHICLE HARNESS – REVISION 10 AND LATER
PLOW ASSEMBLY
RIGHT SIDE PLOW LAMPS
RED
T
P
BRN
RED
PUR
BRN
BRN
T
P
See specific wiring schematic
for proper relay wire connections.
WHT
BLK/ORN
BLK
H
L
BLK/ORN
(GROUND)
WHT (HIGH BEAM)
BLK (LOW BEAM)
1
BLK/ORN
S3 SOLENOID
LT BLU
SFE6
LOCATED AT FRONT OF VEHICLE
LT GRN
S1 SOLENOID
WHT/YEL
PUMP MOTOR
- M + #6 BLK/RED
#6 BLK
1
2
3
4
5
6
7
8
9
10
11
12
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
GRY
PUR
BRN
RED
IGNITION
RED
LT GRN
ORN/BLK
BRN/RED
LT BLU
PUR
1
2
3
4
5
6
7
8
GRY
9
PUR
10
BRN
11
12
PUR
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
S2 SOLENOID
BLK/ORN
WHT
WHT/YEL
GRN
2
4
2
5
3
6
BLK
BLU
RED
*REPRESENTATION
4
OF PRINTED
CIRCUIT BOARD
BLK
BLK/ORN
WHT
L
H
**HAND HELD
CONTROL
5
6
LOCATED UNDER DASH
1
2
3
4
5
#6 BLK/RED
#6 BLK
53
BRN
3
1
*SOLENOID
CONTROL
#6 BLK/RED
#6 BLK
6
BLU
RED
YEL
ORN
GRN
WHT
BLK
1
2
3
4
5
6
7
BRN
T
RED
GRY
BRN
MTR RLY
#6 BLK/RED
ORN/BLK
P
T
RED
LEFT SIDE PLOW LAMPS
Lit. No. 22373, Rev. 07
3
4
5
6
7
OF PRINTED
CIRCUIT BOARD
LOCATED NEAR BATTERY
#6 BLK
BRN/RED
#6 RED
12V BATTERY
BRN
2
**REPRESENTATION
COIL CORD HARNESS
P
1
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
ELECTRICAL SCHEMATIC – 9-PIN VEHICLE HARNESS – REVISION 1-9
PLOW ASSEMBLY
RIGHT SIDE PLOW LAMPS
RED
T
P
BRN
RED
PUR
BRN
BRN
T
P
See specific wiring schematic
for proper relay wire connections.
WHT
BLK/ORN
BLK
H
L
BLK/ORN
(GROUND)
WHT (HIGH BEAM)
BLK (LOW BEAM)
DIODE
REV. 7-9
BLK/ORN
LT GRN
S1 SOLENOID
WHT/YEL
PUMP MOTOR
- M + #6 BLK/RED
#6 BLK
BLK
BLK/ORN
WHT
L
BRN
BRN
RED
GRY
P
T
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
GRY
PUR
BRN
LT GRN
BLK/ORN
BRN/RED
LT BLU
WHT/YEL
1
2
2
3
3
4
4
5
5
6
6
54
*SOLENOID
CONTROL
GRN
BRN
BLK
BLU
RED
*REPRESENTATION
OF PRINTED
CIRCUIT BOARD
#6 BLK/RED
#6 BLK
LOCATED NEAR BATTERY
MTR RLY
#6 BLK/RED
RED
#6 BLK
BRN/RED
Lit. No. 22373, Rev. 07
1
WHT
LOCATED UNDER DASH
BLK/ORN
LEFT SIDE PLOW LAMPS
RED
IGNITION
RED
BRN
P
T
#6 BLK/RED
#6 BLK
1
2
3
4
5
6
7
8
9
10
11
12
PUR
1
2
3
4
5
6
7
8
GRY
9
PUR
10
BRN
11
12
PUR
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
S2 SOLENOID
H
SFE6
LOCATED AT FRONT OF VEHICLE
#6 RED
12V BATTERY
BLK/ORN
S3 SOLENOID
LT BLU
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
PLOW SIDE
HEADLAMP KIT:
9 PIN
RED
T
P
BLK/ORN
BRN
T
P
RED
BLK/ORN
BRN
VALVE MANIFOLD
H
S3(4W)
LT BLU
S1(2W)
WHT/YEL
BLK/ORN
BLK
L
WHT/YEL
1
BLK
2
LT GRN
3
LT BLU
4
BLK/ORN
5
WHT
6
BLK/ORN
(GROUND)
WHT (HIGH BEAM)
WHT
P
BRN
BLK/ORN
T
RED
P
BRN
BLK/ORN
RED
T
Lit. No. 22373, Rev. 07
BLK
BLKORN
BLK/ORN
12
MOTOR
GRY
LEFT SIDE
LAMPS
8
GRY
9
PUR
10
BRN
11
BRN
BLK/ORN
H
55
7
BLK
(LOW BEAM)
L
S2(3W)
LT GRN
PUR
WHT
BRN
BLK/ORN
RIGHT SIDE
LAMPS
BLK/ORN
M
+
#6 BLK/RED
#6 BLK
LOCATED AT
FRONT OF VEHICLE
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HEADLAMP KIT:
9 PIN
HARNESS TYPE:
A
HEADLAMPS:
87
87A
T
85
DRLs:
PUR
86
P
2B/2D
HB1/HB5
NO
30
PUR
RED
BLU
H
L
SFE6
PUR
ORN
1
2
WHT/YEL
RED
IGNITION
NOTE: All 1997 and later Ford
trucks require Kit #61185 for turn
signals and cab marker lights if
equipped.
RED 1
LT GRN 2
BLK
LT GRN
LT BLU
BLK/ORN
WHT
3
4
5
6
7
8
GRY
9
PUR
10
BRN
11
12
ORN/BLK 3
BRN/RED 4
LT BLU 5
56
WHT/YEL 6
LOCATED UNDER DASH
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
#6 BLK
LOCATED AT
FRONT OF VEHICLE
L
BRN
GRY
H
ORN
BLU
RED
P
T
13606-98
ORN 87A
BLK 87
30 YEL
BRN 86
85 BLK/ORN
RED 87A
WHT 87
30 GRN
BRN 86
85 BLK/ORN
LOW BEAM
RELAY
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
T
P
PUR
Headlamp Relay
Terminal Locations
HEADLAMP KIT:
9 PIN
HARNESS TYPE:
A
HEADLAMPS:
87
86
87A
DK BLU
85
L
ORN
H
RED
DK BLU
DRLs:
HB3/HB4
LF/UF
NO
PUR
PUR
30
1
2
3
4
5
6
7
8
9
10
11
12
SFE6
WHT/YEL
BLK
LT GRN
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
LT BLU
BLK/ORN
WHT
BRN/RED 4
LT BLU 5
57
WHT/YEL 6
GRY
PUR
BRN
LOCATED UNDER DASH
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
#6 BLK
LOCATED AT
FRONT OF VEHICLE
H
L
LT BLU
RED
ORN
DK BLU
ORN 87A
BLK 87
30 YEL
BRN 86
85 BLK/ORN
RED 87A
WHT 87
30 GRN
BRN 86
85 BLK/ORN
LOW BEAM
RELAY
HIGH BEAM
RELAY
YEL (LOW)
BRN
DK BLU (GND)
13637-97
Lit. No. 22373, Rev. 07
GRN (HIGH)
GRY
P
T
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
T
P
PUR
Headlamp Relay
Terminal Locations
85
A
1A/2A
NO
ORN
30
RED
BLU
SFE6
PUR
H
PUR
86
HARNESS TYPE:
DRLs:
RED
BLU
H
L
9 PIN
HEADLAMPS:
87
87A
HEADLAMP KIT:
1
2
3
4
5
6
7
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BRN/RED 4
LT BLU 5
58
WHT/YEL 6
8
GRY
9
PUR
10
BRN
11
LOCATED UNDER DASH
LOCATED NEAR BATTERY
12
#6 BLK/RED
ORN/BLK
#6 BLK
LOCATED AT
FRONT OF VEHICLE
H
BLU
RED
ORN
BLU
H
RED
Lit. No. 22373, Rev. 07
P
T
YEL
BRN 86
85
BLK/ORN
RED 87A
WHT 87
30
GRN
BRN 86
85 BLK/ORN
LOW BEAM
RELAY
BRN/RED
#6 BLK
HIGH BEAM
RELAY
YEL (LOW)
GRY
13597-97
30
GRN (HIGH)
BLU (GND)
BRN
L
ORN 87A
BLK 87
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
PUR
DRLs:
85
30
RED
BLU
H
L
A
2B/2D
HB1/HB5
YES
PUR
87A
HEADLAMPS:
ORN
BROWN WIRES
NOT USED
ON DRL VEHICLES
PUR
86
HARNESS TYPE:
T
P
87
HEADLAMP KIT: 9 PIN
PNK
DRL KIT WIRE
3AG5
PNK
SFE6
WHT/YEL
1
BLK
2
LT GRN
3
LT BLU
4
BLK/ORN
5
WHT
6
7
8
GRY
9
PUR
10
BRN
11
12
RED
IGNITION
NOTE: All 1997 and later Ford
trucks require Kit #61185 for turn
signals and cab marker lights if
equipped.
RED 1
LT GRN 2
ORN/BLK 3
BRN/RED 4
LT BLU 5
59
WHT/YEL 6
LOCATED UNDER DASH
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
#6 BLK
LOCATED AT
FRONT OF VEHICLE
L
BRN
GRY
H
ORN
BLU
RED
13606-93
P
T
ORN 87A
BLK 87
30
YEL
PNK 86
85
BLK/ORN
RED 87A
WHT 87
30
GRN
PNK 86
85
BLK/ORN
LOW BEAM
RELAY
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
T
P
PUR
Headlamp Relay
Terminal Locations
86
9 PIN
HARNESS TYPE:
A
HEADLAMPS:
87
87A
HEADLAMP KIT:
DRLs:
HB3/HB4
YES
DK BLU
85
L
ORN
H
RED
DK BLU
PUR
30
BROWN WIRES
NOT USED
ON DRL VEHICLES
PUR
PNK
1
2
3
4
5
6
7
8
9
10
11
12
DRL KIT WIRE
3AG5
PNK
SFE6
WHT/YEL
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BRN/RED 4
LT BLU 5
60
WHT/YEL 6
GRY
PUR
BRN
LOCATED UNDER DASH
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
#6 BLK
LOCATED AT
FRONT OF VEHICLE
H
13637-92
Lit. No. 22373, Rev. 07
GRY
P
T
30
PNK 86
85 BLK/ORN
RED 87A
WHT 87
30
PNK 86
85 BLK/ORN
YEL
LOW BEAM
RELAY
BRN/RED
#6 BLK
GRN
HIGH BEAM
RELAY
DK BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
YEL (LOW)
ORN
DK BLU
BRN
L
LT BLU
RED
ORN 87A
BLK 87
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
HEADLAMP KIT: 9 PIN
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HARNESS TYPE:
HEADLAMPS:
87
85
30
T
P
PUR
87A
DRLs:
RED
DK BLU
H
L
DK BLU (GND)
PUR
86
ORN
PUR
1
2
3
4
5
6
7
8
GRY
9
PUR
10
BRN
11
12
2B/2D
2E
HB1
NO
FROM
VEHICLE HEADLAMP
CONNECTOR
SFE6
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
C
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BRN/RED 4
LT BLU 5
61
WHT/YEL 6
LOCATED UNDER DASH
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
#6 BLK
LOCATED AT
FRONT OF VEHICLE
L
BRN
GRY
H
ORN
LT BLU
RED
13607-98
63103-91
P
T
ORN 87A
BLK 87
30
YEL
BRN 86
85
BLK/ORN
RED 87A
WHT 87
30
GRN
85
BLK/ORN
BRN
86
LOW BEAM
RELAY
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HARNESS TYPE:
C
PUR
85
30
RED
DK BLU
H
L
DK BLU (GND)
ORN
BROWN WIRES
NOT USED
ON DRL VEHICLES
DRLs:
FROM
VEHICLE HEADLAMP
CONNECTOR
PUR
87A
PNK
PUR
86
9 PIN
HEADLAMPS:
T
P
87
HEADLAMP KIT:
YES
DRL KIT WIRE
3AG5
PNK
SFE6
WHT/YEL
1
BLK
2
LT GRN
3
LT BLU
4
BLK/ORN
5
WHT
6
7
8
GRY
9
PUR
10
BRN
11
12
2B/2D
2E
HB1
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BRN/RED 4
LT BLU 5
62
WHT/YEL 6
LOCATED UNDER DASH
LOCATED NEAR BATTERY
#6 BLK
LOCATED AT
FRONT OF VEHICLE
L
BRN
GRY
H
ORN
LT BLU
RED
13607-92
63103-92
P
T
ORN 87A
BLK 87
30
YEL
PNK 86
85
BLK/ORN
RED 87A
WHT 87
30
GRN
PNK 86
85
BLK/ORN
LOW BEAM
RELAY
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
ORN/BLK
#6 BLK/RED
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
9-PIN HARNESS
HEADLAMP KIT: 9 PIN
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HARNESS TYPE:
87
T
P
PUR
85
30
H
87A
PUR
L
BLK 87
5
6
7
30
DK BLU (COM)
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
87A
WHT 87
TAN 86
NO
RED
85 BLK
SFE6
RED
IGNITION
30
85
RED
WHT
PLOW
HIGH BEAM
RELAY
BRN/RED 4
LT BLU 5
63
WHT/YEL 6
15 A
TAN
LOCATED UNDER DASH
ORN 87A
BLK 87
30
TAN 86
85
YEL
BLK/
ORN
RED
15 A
LOW BEAM
RELAY
LOCATED NEAR BATTERY
MTR RLY
#6 BLK/RED
#6 BLK
ORN/BLK
TAN
#6 BLK/RED
BRN/RED
#6 BLK
BRN
LOCATED AT
FRONT OF VEHICLE
ORN
DK BLU
H
RED
HIGH BEAM
RELAY
RED 87A
30 GRN
WHT 87
GRY
BRN
L
P
T
DRLs:
RED 1
LT GRN 2
ORN/BLK 3
8
GRY
9
PUR
10
BRN
11
12
13607-98
63103-91
HB1
FROM
VEHICLE HEADLAMP
CONNECTOR
PUR
TAN 86
1
2
3
4
YEL (LOW)
GRN (HIGH)
PLOW
LOW BEAM
RELAY
RED
DK BLU
ORN
HEADLAMPS:
BRN 86
85
BLK/
ORN
#6 RED
12V BATTERY
86
87A
F
YEL (LOW)
FROM
GRN (HIGH)
VEHICLE HEADLAMP
CONNECTOR
DK BLU (COM)
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
9-PIN HARNESS
P
HARNESS TYPE:
87
(NOT USED)
DK BLU
DK BLU
LT BLU/ORN
LT BLU/ORN
85
30
PLOW
LOW BEAM
RELAY
RED
DK BLU
H
L
ORN
PUR
87A
BLK 87
1
2
3
4
WHT/YEL
BLK
HEADLAMPS:
HB5
DRLs:
NO
GRN
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL
30 RED
85 BLK
SFE6
PUR
TAN 86
FROM
VEHICLE HEADLAMP
CONNECTOR
(NOT USED)
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
LT GRN
LT BLU
BLK/ORN
5
WHT
6
7
8
GRY
9
PUR
10
BRN
11
12
PLOW
87A
HIGH BEAM
RELAY WHT 87
TAN 86
BRN/RED 4
LT BLU 5
30 RED
85 WHT
WHT/YEL 6
15 A
TAN
ORN 87A
BLK 87
LOW BEAM
TAN 86
RELAY
RED
30 YEL
15 A
LOCATED NEAR BATTERY
85 BLK/
MTR RLY
ORN
#6 BLK/RED
ORN/BLK
TAN
#6 BLK
ORN
DK BLU
RED
GRY
H
13607-98
63103-91
P
T
Lit. No. 22373, Rev. 07
DK BLU
LT BLU/ORN
GRY
(NOT USED)
BRN/RED
#6 BLK
BRN
LOCATED AT
FRONT OF VEHICLE
64
LOCATED UNDER DASH
#6 BLK/RED
L
F
BRN
GRY
GRY
GRY
RED 87A
WHT 87
30 GRN
BRN 86
85 BLK/
ORN
HIGH BEAM
RELAY
#6 RED
12V BATTERY
86
87A
HEADLAMP KIT: 9 PIN
VEHICLE SIDE
T
PUR
Headlamp Relay
Terminal Locations
BLK
RED
PUR
YEL (LOW)
GRN (HIGH)
DK BLU (COM)
DK BLU
LT BLU/ORN
TO PARK TURN
HEADLAMP
ASSEMBLY
FROM
VEHICLE HEADLAMP
CONNECTOR
FROM
VEHICLE HEADLAMP
CONNECTOR
(NOT USED)
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
85
30
RED
DK BLU
ORN
H
L
87A
TAN 86
PUR
DK BLU
H
L
BLK 87
LT BLU/
ORN
PLOW
87A
HIGH BEAM
RELAY WHT 87
TAN 86
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
1
2
3
4
5
6
7
8
GRY
9
PUR
10
BRN
11
12
HARNESS TYPE:
FROM OUTER
VEHICLE HEADLAMP
CONNECTOR
HB-5 (9007)
TAN
LT BLU/ 87A
ORN 87
INNER BEAM
RELAY TAN 86
15 A
85
BLK
30
RED
85
WHT
RED
15 A
SFE6
TAN
BRN
L
LT BLU/
ORN
H
DK BLU
LOW BEAM
RELAY
ORN 87A
BLK 87
30
LT
BLU
85
BLK/
ORN
30
YEL
85
BLK/
ORN
WHT/YEL 6
LOCATED UNDER DASH
MTR RLY
GRY
RED 87A
WHT 87
30
GRN
BRN 86
85
BLK/
ORN
BRN/RED
#6 BLK
LT BLU
DK BLU (COM)
YEL (LOW)
ORN
DK BLU
RED
65
BRN/RED 4
LT BLU 5
LOCATED NEAR BATTERY
HIGH BEAM
RELAY
DK BLU (COM)
GRN (HIGH)
BRN
Lit. No. 22373, Rev. 07
RED
IGNITION
#6 BLK/RED
ORN/BLK
LOCATED AT
FRONT OF VEHICLE
P
T
NO
30
#6 BLK
13607-98
63103-91
DRLs:
FROM INNER
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
LT BLU
HB-1 (9004)
#6 BLK/RED
H
HB1/HB5
RED 1
LT GRN 2
ORN/BLK 3
TAN 86
L
HEADLAMPS:
F
#6 RED
12V BATTERY
86
87A
YEL (LOW)
PLOW
LOW BEAM
RELAY
PUR
87
GRN (HIGH)
DK BLU (COM)
PUR
T
P
HEADLAMP KIT: 9 PIN
FROM INNER
VEHICLE HEADLAMP
CONNECTOR
HB-1 (9004)
FROM OUTER
VEHICLE HEADLAMP
CONNECTOR
HB-5 (9007)
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HARNESS TYPE:
PUR
T
87A
H
87
WHT
PNK
BLK
PUR
YEL
GRN
ORN
RED
RED
BLACK
BLK
86
TAN
87A
30
87
85
86
PLOW HIGH
BEAM RELAY
#1
PNK
30
85
SFE6
PLOW LOW
BEAM RELAY
#2
RED
IGNITION
RED 1
LT GRN
YEL
2
ORN/BLK 3
86
30
LOCATED AT
FRONT
OF VEHICLE
86
85
HIGH BEAM
RELAY
#3
12
87
30
5
WHT/YEL 6
#6 BLK/RED
MTR RLY
#6 BLK/RED
#6 BLK
RED
H
RED
86
30
87A
TAN
87
85
86
#6 BLK
30
#6 RED
ORN/BLK
TAN
BRN
87A
MODIFIED
10” WIRE 87
DK BLU
66
85
LOW BEAM
RELAY
#4
BRN
BRN/RED 4
LT BLU
RED
87
GRY
9
PUR
10
BRN
11
87A
BLK/ORN
87A
TAN
RED
7
8
LOCATED UNDER DASH
1 WHT/YEL
BLK
2
LT GRN
3
LT BLU
4
BLK/ORN
5
WHT
6
YES
RED
BLK
PNK
DK BLU
RED
BLK
ORN
DRLs:
F
HB3/HB4
TAN
}
}
DK BLU
FROM VHICLE
YEL
HEADLIGHT
DK BLU CONNECTORS
GRN
L
HEADLAMPS:
AUTOMATIC LIGHT SYSTEM
DK BLU
RED
85
30
DRL
PLOW MODULE
CONNECTOR
TO PARK LAMP
BULLET CONNECTOR
P
TAN
86
RED
15 AMP FUSE
HOLDER
9 PIN
12V BATTERY
87
87A
HEADLAMP KIT:
LOCATED NEAR BATTERY
85
ORN
GRY
13637-97
Lit. No. 22373, Rev. 07
T
P
TURN SIGNAL BULLET
CONNECTOR
TAN
PNK
DK BLU
YEL FROM VEHICLE
HEADLIGHT
GRN CONNECTORS
PLOW DRL
RELAY
#6
TAN
PLOW PARK
LAMP RELAY
#5
L
RED
PNK
TAP fromDK BLU
or ORN DRL
LAMP WIRE
BRN/RED
BRN
MODIFIED
14” WIRE
TO PARK LAMP
BULLET CONNECTOR
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
HEADLAMP KIT: 9 PIN
VEHICLE SIDE
HARNESS TYPE:
HEADLAMPS:
HB5
DRLs:
NO
PUR
T
G
P
RED/WHT
DK BLU
PS LOW BEAM
RELAY
ORN/WHT 87A
ORN/WHT
PUR
TAN 87
WHT
BLK
LT GRN
LT BLU
BLK/ORN
WHT
SFE6
TAN 86
GRY
PUR
10
BRN
11
12
30
DS LOW BEAM RELAY
ORN 87A
30 YEL
BLK 87
85 TAN
MTR RLY
JUMPER
#6 BLK
BRN/RED
#6 BLK
BRN
RED 87A
WHT 87
BRN 86
30 GRN
#6 RED
BLK
RED
GRY
GRY
TAN
TAN
BRN
JUMPER
67
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
RED
DK BLU
ORN
85
30
WHT/YEL 6
85 TAN
#6 BLK/RED
LOCATED AT
FRONT OF VEHICLE
87A
LOCATED UNDER DASH
TAN 86
L
86
ORN/BLK 3
BRN/RED 4
LT BLU 5
PS HI BEAM RELAY
RED/WHT 87A
GRN/WHT
TAN 87
H
RED
IGNITION
RED 1
LT GRN 2
TAN
1
2
3
4
5
6
7
8
9
87
85 TAN
PUR
TAN 86
30 YEL/WHT
12V BATTERY
L
Headlamp Relay
Terminal Locations
GRN/WHT
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL/ WHT
JUMPER
H
PUR
85 BLK/ORN
TO PARK TURN
HEADLAMP
ASSEMBLY
GRY
YEL (LOW)
DS HIGH BEAM
RELAY
GRN (HIGH)
DK BLU (COM)
FROM
VEHICLE HEADLAMP
CONNECTOR
13607-98
63103-91
P
T
Lit. No. 22373, Rev. 07
GRY
BLK/ORN
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
9-PIN HARNESS
HEADLAMP KIT: 9 PIN
VEHICLE SIDE
HARNESS TYPE:
HEADLAMPS:
HB5
DRLs:
NO
PUR
T
G
RED/WHT
DK BLU
PS LOW BEAM
RELAY
ORN/WHT 87A
ORN/WHT
PUR
L
TAN 87
1
87
30 YEL/WHT
85 TAN
SFE6
PUR
TAN 86
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
2
3
4
5
6
7
8
GRY
9
PUR
10
BRN
11
12
TAN 87
TAN
(JUMPER)
TAN 86
DS LOW BEAM RELAY
ORN 87A
30 YEL
BLK 87
TAN
68
LOCATED NEAR BATTERY
85 TAN
MTR RLY
PUR
PUR
RED 87A
WHT 87
BRN
86
BLK
RED
GRY
GRY
30 GRN
TAN
GRY
BRN/RED
#6 BLK
#6 RED
(JUMPER)
TAN
PUR
PUR
(JUMPER)
BRN
85
30
LOCATED UNDER DASH
#6 BLK
RED
DK BLU
ORN
87A
WHT/YEL 6
85 TAN
#6 BLK/RED
ORN/BLK
LOCATED AT
FRONT OF VEHICLE
86
BRN/RED 4
LT BLU 5
30
#6 BLK/RED
L
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
PS HI BEAM RELAY
RED/WHT 87A
GRN/WHT
TAN 86
H
Headlamp Relay
Terminal Locations
GRN/WHT
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL/ WHT
TAN
(JUMPER)
H
12V BATTERY
P
85 BLK/ORN
BRN
YEL (LOW)
DS HIGH BEAM
RELAY
GRN (HIGH)
DK BLU (COM)
FROM
VEHICLE HEADLAMP
CONNECTOR
P
T
Lit. No. 22373, Rev. 07
GRY
BLK/ORN
November 1, 2008
9-PIN HARNESS
HEADLAMP KIT: 9 PIN
VEHICLE SIDE
HARNESS TYPE:
HEADLAMPS:
HB5
DRLs:
YES
PUR
T
G
P
RED/WHT
DK BLU
PS LOW BEAM
RELAY
ORN/WHT 87A
ORN/WHT
3
4
5
6
7
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
TAN 87
30
YEL/WHT
85
TAN
87
TAN 86
(JUMPER)
SFE6
8
GRY
9
PUR
10
BRN
11
PNK 86
30
85
12
PNK 86
85
LOCATED NEAR BATTERY
TAN
MTR RLY
#6 BLK/RED
ORN/BLK
#6 BLK
PUR
PUR
GRY
RED 87A
30
GRN
85
BLK/ORN
WHT 87
PNK
86
BLK
RED
GRY
GRY
ORN
BRN/RED
#6 BLK
#6 RED
TAN
TAN
RED
DK BLU
(JUMPER)
PUR
PUR
NOT
USED
69
LOCATED UNDER DASH
#6 BLK/RED
LOCATED AT
FRONT OF VEHICLE
85
30
WHT/YEL 6
TAN
DS LOW BEAM RELAY
ORN 87A
30 YEL
BLK 87
87A
ORN/BLK 3
BRN/RED 4
LT BLU 5
PS HI BEAM RELAY
RED/WHT 87A
GRN/WHT
TAN 87
L
86
RED 1
LT GRN 2
WHT
H
RED
IGNITION
12V BATTERY
1
2
PUR
PUR
L
Headlamp Relay
Terminal Locations
GRN/WHT
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL/ WHT
TAN
(JUMPER)
H
BRN
YEL (LOW)
DS HIGH BEAM
RELAY
GRN (HIGH)
DK BLU (COM)
FROM
VEHICLE HEADLAMP
CONNECTOR
P
T
GRY
BLK/ORN
PNK
FUSE
TO SWITCHED ACC LINE
DRL HARNESS
Lit. No. 22373, Rev. 07
November 1, 2008
9-PIN HARNESS
VEHICLE SIDE
HEADLAMP KIT: 9 PIN
HARNESS TYPE:
PUR
T
P
RED/WHT
DK BLU
ORN/WHT 87A
PUR
TAN 87
WHT
30
YEL/WHT
85
TAN
87
SFE6
TAN 86
GRY
PUR
BRN
30
85
86
85
TAN
MTR RLY
JUMPER
BRN/RED
#6 BLK
BRN
RED 87A
WHT 87
PNK 86
#6 RED
BLK
RED
GRY
GRY
TAN
PNK TAN
JUMPER
#6 BLK
(NOT
USED)
70
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
(NOT
USED)
85
30
LOCATED UNDER DASH
#6 BLK/RED
RED
DK BLU
ORN
87A
WHT/YEL 6
TAN
DS LOW BEAM RELAY
ORN 87A
30 YEL
BLK 87
TAN 86
L
RED
IGNITION
ORN/BLK 3
BRN/RED 4
LT BLU 5
PS HI BEAM RELAY
RED/WHT 87A
GRN/WHT
TAN 87
H
Headlamp Relay
Terminal Locations
12V BATTERY
BLK
LT GRN
LT BLU
BLK/ORN
WHT
LOCATED AT
FRONT OF VEHICLE
YES
RED 1
LT GRN 2
TAN
1
2
3
4
5
6
7
8
9
10
11
12
DRLs:
PUR
TAN 86
HB5
GRN/WHT
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL/ WHT
PS LOW BEAM
RELA Y
ORN/WHT
L
HEADLAMPS:
JUMPER
H
G
30
GRN
85
BLK/ORN
PUR
TO PARK TURN
HEADLAMP
ASSEMBLY
GRY
YEL (LOW)
DS HIGH BEAM
RELAY
GRN (HIGH)
DK BLU (COM)
FROM
VEHICLE HEADLAMP
CONNECTOR
13607-98
63103-91
P
T
Lit. No. 22373, Rev. 07
GRY
BLK/ORN
PNK
TO SWITCHED ACCESSORY LINE
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
ELECTRICAL SCHEMATIC – 12-PIN VEHICLE HARNESS – REVISION 8 AND LATER
PLOW ASSEMBLY
RIGHT SIDE PLOW LAMPS
RED
T
BRN
P
PUR
BLK/ORN
BRN
RED
T
BRN
P
See specific wiring schematic
for proper relay wire connections.
WHT
DK BLU/ORN
BLK
H
L
DK BLU/ORN-RIGHT
LT BLU/ORN-LEFT
(GROUND)
PUR
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
BLK/ORN
S2 SOLENOID
LT GRN
S1 SOLENOID
WHT/YEL
PUMP MOTOR
-
M
+
#6 BLK/RED
#6 BLK
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
PUR
LOCATED AT FRONT OF VEHICLE
BLK/WHT
WHT(HIGH BEAM)
BLK-RIGHT
BLK/WHT-LEFT
(LOW BEAM)
BLK/ORN
S3 SOLENOID
LT BLU
DRL KIT WIRE
3AG5
PNK
SFE6
WHT
1
GRN
2
RED
LT GRN
ORN/BLK
BRN/RED
LT BLU
WHT/YEL
BLK
4
BLU
5
1
71
BRN
3
RED
IGNITION
*SOLENOID
CONTROL
RED
6
*REPRESENTATION
2
OF PRINTED
CIRCUIT BOARD
3
4
BLU
1
5
RED
2
6
YEL
3
LOCATED UNDER DASH
ORN
4
GRN
5
H
BRN
P
RED
BRN
BLK/ORN
GRY
BLK
Lit. No. 22373, Rev. 07
3
4
5
6
7
1
2
3
4
5
6
7
OF PRINTED
CIRCUIT BOARD
LOCATED NEAR BATTERY
MTR RLY
#6 BLK/RED
ORN/BLK
#6 BLK
BRN/RED
LEFT SIDE PLOW LAMPS
2
COIL CORD HARNESS
P
RED
1
**REPRESENTATION
BRN
T
WHT
6
BLK/WHT
LT BLU/ORN
WHT
L
T
#6 BLK/RED
#6 BLK
#6 RED
12V BATTERY
#6 BLK/RED
#6 BLK
**HAND HELD
CONTROL
NOTE: All relays are shown
in the de-energized state.
November 1, 2008
ELECTRICAL SCHEMATIC – 12-PIN VEHICLE HARNESS – REVISION 1–7
PLOW ASSEMBLY
RIGHT SIDE PLOW LAMPS
RED
T
BRN
P
PUR
BLK/ORN
BRN
RED
T
BRN
P
See specific wiring schematic
for proper relay wire connections.
WHT
DK BLU/ORN
BLK
H
L
DK BLU/ORN-RIGHT
LT BLU/ORN-LEFT
(GROUND)
PUR
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
LT GRN
S1 SOLENOID
WHT/YEL
PUMP MOTOR
-
M
+
#6 BLK/RED
#6 BLK
#6 BLK/RED
#6 BLK
1
2
3
4
5
6
7
8
9
10
11
12
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
DRL KIT WIRE
3AG5
PNK
SFE6
H
BRN
P
RED
LT GRN
BLK/ORN
BRN/RED
LT BLU
WHT/YEL
1
1
2
2
3
3
4
4
5
5
6
6
WHT
*SOLENOID
CONTROL
GRN
BRN
BLK
BLU
RED
*REPRESENTATION
LOCATED UNDER DASH
OF PRINTED
CIRCUIT BOARD
#6 BLK/RED
#6 BLK
RED
BRN
BLK/ORN
GRY
LOCATED NEAR BATTERY
MTR RLY
#6 BLK/RED
BRN
BLK/ORN
RED
#6 BLK
BRN/RED
P
T
72
RED
IGNITION
BLK/WHT
LT BLU/ORN
WHT
L
T
1
2
3
4
5
6
7
8
9
10
11
12
DIODE
REV.
5-7
LEFT SIDE PLOW LAMPS
Lit. No. 22373, Rev. 07
#6 RED
12V BATTERY
BLK/ORN
S2 SOLENOID
PUR
LOCATED AT FRONT OF VEHICLE
BLK/WHT
WHT(HIGH BEAM)
BLK-RIGHT
BLK/WHT-LEFT
(LOW BEAM)
BLK/ORN
S3 SOLENOID
LT BLU
NOTE: All relays are shown
in the de-energized state.
November 1, 2008
12-PIN HARNESS
PLOW SIDE
HEADLAMP KIT:
12 PIN
Headlamp Relay
Terminal Locations
RED
Reposition wires as shown below
for the following applications:
- Nissan with and without DRL's
- 2003 and later Dodge and GM
- Toyota with DRL's
T
P
BLK/ORN
BRN
T
P
RED
BLK/ORN
BRN
87
VALVE MANIFOLD
H
DK BLU/ORN
WHT
L
BLK
BLK/ORN
DK BLU/ORN - RIGHT
LT BLU/ORN - LEFT
(HIGH BEAM)
LT BLU
LT GRN
WHT/YEL
PUR
WHT (GROUND)
BRN
RIGHT SIDE
LAMPS
S3(4W)
WHT (HIGH BEAM)
BLK-RIGHT
BLK/WHT-LEFT
(LOW BEAM)
LEFT SIDE
LAMPS
P
BRN
BLK/ORN
T
RED
P
BRN
BLK/ORN
RED
T
Lit. No. 22373, Rev. 07
MOTOR
-
M
+
1
2
3
4
5
6
7
8
9
10
11
12
73
#6 BLK/RED
#6 BLK
GRY
BLK/ORN
LT BLU/ORN
BRN
H
S2(3W)
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
BLK/ORN
85
S1(2W)
DK BLU/ORN - RIGHT
LT BLU/ORN - LEFT
(GROUND)
BLK/WHT
WHT
87A
30
BLK-RIGHT
BLK/WHT-LEFT
(LOW BEAM)
L
86
BLK/ORN
LOCATED AT
FRONT OF VEHICLE
November 1, 2008
12-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HEADLAMP KIT:
HARNESS TYPE:
A
(combines 2 harnesses)
87
HEADLAMPS:
87A
85
PUR
T
86
12 PIN
P
PUR
YEL
GRN
30
L
BROWN WIRES
NOT USED
ON DRL VEHICLES
DRLs: YES/NO
(Nissan w/ and w/o DRLs;
Toyota w/DRLs)
FROM
VEHICLE HEADLAMP
CONNECTOR
BLU
RED
BLU
ORN
H
YEL (LOW)
GRN (HIGH)
BLU (GND)
PNK
DRL KIT WIRE
3AG5
PNK
SFE6
ORN
BLK 87
30
PUR
PNK 86
85
BLK/ORN
(NOT USED)
RED 87A
DK BLU/ORN 87
PNK 86
30
85
BLU
RIGHT SIDE
LOW BEAM
RELAY
BLK/ORN
PUR
87A
PNK
BLK/WHT
5
6
7
8
9
10
11
12
PUR
1
2
3
4
PNK
BLK/ORN
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BRN/RED 4
LT BLU 5
74
WHT/YEL 6
LOCATED UNDER DASH
RIGHT SIDE
HIGH BEAM
RELAY
BLK/ORN
2B/2D
HB1
LOCATED NEAR BATTERY
BRN
GRY
H
ORN
BLU
RED
P
T
PNK
86
RED 87A
LT BLU/ORN 87
TAN 86
BLK/ ORN
PNK
WHT
L
BLU
LOCATED AT
FRONT OF VEHICLE
ORN 87A
LT BLU/ORN 87
#6 BLK/RED
ORN/BLK
30
YEL
85
BLK/ORN
30
GRN
85
TAN
LEFT SIDE
LOW BEAM
RELAY
LEFT SIDE
HIGH BEAM
RELAY
YEL (LOW)
GRN (HIGH)
BLU (GND)
13600-98
Lit. No. 22373, Rev. 07
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
#6 BLK
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT: 12 PIN
VEHICLE SIDE
HARNESS TYPE:
HEADLAMPS:
DK BLU/WHT
ORN
DK BLU (GND)
NO
Headlamp Relay
Terminal Locations
FROM
VEHICLE HEADLAMP
CONNECTOR
PUR
L
PUR
RED
H
2B/2D
DRLs:
PUR
T
P
B
87
SFE6
86
RED 1
LT GRN 2
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
87A
85
30
ORN/BLK 3
BRN/RED 4
LT BLU 5
BLK/ORN
WHT
GRN
WHT/YEL 6
DK BLU/WHT 87A
DK BLU/ORN 87
BLK
3
4
5
6
7
8
9
10
11
12
WHT/YEL
BLK/WHT
1
2
RED
IGNITION
BRN 86
30
DK BLU
85
BLK/ORN
75
LOCATED UNDER DASH
RIGHT SIDE
RELAY
LOCATED NEAR BATTERY
#6 BLK
BRN
RED 87A
L
P
T
13625-92
87
BRN
86
30
GRN
85
BLK/ORN
30
LT BLU
85
BLK/ORN
VEHICLE
HIGH BEAM
RELAY
BRN/RED
#6 BLK
ORN
LT BLU/WHT
RED
BRN
GRY
H
ORN
YEL
LOCATED AT
FRONT OF VEHICLE
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
ORN/BLK
#6 BLK/RED
LT BLU/WHT 87A
LT BLU/ORN 87
BRN 86
LEFT SIDE
RELAY
YEL (LOW)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT: 12 PIN
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HARNESS TYPE:
B
(combines 2 harnesses)
87
PUR
85
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
HB1
DRLs:
NO
FROM
VEHICLE HEADLAMP
CONNECTOR
SFE6
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BLK/ORN
WHT
GRN
BRN/RED 4
LT BLU 5
WHT/YEL 6
BLK/WHT
BLK
1
2
3
4
5
6
7
8
9
10
11
12
BLU
PUR
L
BLU (GND)
HEADLAMPS:
BLU
RED
BLU
ORN
H
PUR
30
BLU
87A
PUR
86
T
P
BLU 87A
DK BLU/ORN 87
BRN 86
30
PUR
85
BLK/ORN
76
LOCATED UNDER DASH
RIGHT SIDE
RELAY
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
BRN
#6 BLK
L
13625-97
P
T
87
BRN
86
30
85
GRN
BLK/ORN
VEHICLE
HIGH BEAM
RELAY
BRN/RED
#6 BLK
ORN
BLU
RED
BRN
GRY
H
ORN
YEL
LOCATED AT
FRONT OF VEHICLE
RED 87A
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
BLU 87A
LT BLU/ORN 87
BRN 86
30 BLU
85 BLK/ORN
LEFT SIDE
RELAY
YEL (LOW)
GRN (HIGH)
BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
12-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HEADLAMP KIT:
12 PIN
HARNESS TYPE:
B
HEADLAMPS:
87
2E
(Early GM applications used
two harnesses spliced together)
PUR
85
30
T
P
RED
DK BLU/WHT
ORN
H
L
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BLK/ORN
GRN
77
BRN/RED 4
LT BLU 5
PNK
WHT
YES
DRL KIT WIRE
3AG5
PNK
SFE6
WHT/YEL 6
DK BLU/WHT 87A
DK BLU/ORN 87
BLK/WHT
BLK
1
2
3
4
5
6
7
8
9
10
11
12
PNK
PUR
BROWN WIRES
NOT USED
ON DRL VEHICLES
DK BLU (GND)
DRLs:
FROM
VEHICLE HEADLAMP
CONNECTOR
PUR
86
87A
2B/2D
PNK 86
30
85
LOCATED UNDER DASH
DK BLU
BLK/ORN
RIGHT SIDE
RELAY
LOCATED NEAR BATTERY
PNK
ORN/BLK
RED 87A
87
LOCATED AT
FRONT OF VEHICLE
GRN
85
BLK/ORN
30
LT BLU
85
BLK/ORN
HIGH BEAM
RELAY
BRN/RED
#6 BLK
ORN
YEL
PNK 86
30
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
#6 BLK/RED
#6 BLK
L
BRN
GRY
H
ORN
LT BLU/WHT
RED
13604-91
Lit. No. 22373, Rev. 07
P
T
LT BLU/WHT 87A
LT BLU/ORN 87
PNK 86
LEFT SIDE
RELAY
YEL (LOW)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTOR
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
12-PIN HARNESS
VEHICLE SIDE
HEADLAMP KIT: 12 PIN
HARNESS TYPE:
T
P
PUR
Headlamp Relay
Terminal Locations
HEADLAMPS:
86
87A
HB3 /HB4
DRLs:
87
L
ORN
DK BLU/WHT
H
DK BLU/WHT
RED
85
B
YES
DRL KIT WIRE
3AG5
PNK
SFE6
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
BLK/ORN
WHT
GRN
78
BRN/RED 4
LT BLU 5
WHT/YEL 6
BLK/WHT
BLK
DK BLU/ORN
GRY
9
PUR
10
BRN
11
LT BLU/ORN
12
PNK
1
2
3
4
5
6
7
8
PNK
PUR
BROWN WIRES
NOT USED
ON DRL VEHICLES
PUR
30
LT BLU/WHT 87A
LT BLU/ORN 87
PNK 86
30
85
LOCATED UNDER DASH
LT BLU
BLK/ORN
HIGH BEAM
RELAY
LOCATED NEAR BATTERY
#6 BLK/RED
PNK
ORN/BLK
RED 87A
H
RED
LT BLU/WHT
ORN
YEL
87
LOCATED AT
FRONT OF VEHICLE
PNK 86
DK BLU/WHT 87A
DK BLU/ORN 87
PNK 86
DK BLU/WHT
ORN
BRN
GRY
L
13604-98
Lit. No. 22373, Rev. 07
P
T
30
GRN
85
BLK/ORN
30
DK BLU
85
BLK/ORN
BRN/RED
#6 BLK
VEHICLE
HIGH BEAM
RELAY
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
#6 BLK
LOW BEAM
RELAY
YEL (LOW)
DK BLU (GND)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTORS
NOTE: All relays are shown in
the de-energized state.
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT:
VEHICLE SIDE
Headlamp Relay
Terminal Locations
HARNESS TYPE:
PUR
T
P
HEADLAMPS:
87
86
87A
DRLs:
85
L
ORN
DK BLU
H
DK BLU
RED
12 PIN
B
LF/UF
YES
PUR
30
WHT/YEL
1
BLK
2
LT GRN
3
LT BLU
4
BLK/ORN
5
WHT
6
BLK/WHT
7
DK BLU/ORN
8
GRY
9
PUR
10
BRN
11
LT BLU/ORN
12
PNK
PUR
BROWN WIRES
NOT USED
ON DRL VEHICLES
DRL KIT WIRE
3AG5
PNK
SFE6
RED 1
LT GRN 2
ORN/BLK 3
BLK/ORN
WHT
RED
IGNITION
79
BRN/RED 4
LT BLU 5
GRN
BLK/WHT
BLK
WHT/YEL 6
LT BLU 87A
LT BLU/ORN 87
PNK 86
30
85
LOCATED UNDER DASH
LT BLU
BLK/ORN
HIGH BEAM
RELAY
LOCATED NEAR BATTERY
#6 BLK/RED
ORN/BLK
#6 BLK
RED 87A
87
H
ORN
YEL
LOCATED AT
FRONT OF VEHICLE
RED
LT BLU
PNK 86
DK BLU 87A
DK BLU/ORN 87
PNK 86
BRN
GRY
L
DK BLU
ORN
13609-98
Lit. No. 22373, Rev. 07
P
T
30
GRN
85
BLK/ORN
30
DK BLU
VEHICLE
HIGH BEAM
RELAY
BRN/RED
#6 BLK
#6 RED
12V BATTERY
MTR RLY
#6 BLK/RED
LOW BEAM
RELAY
85
YEL (LOW)
DK BLU (GND)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTORS
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
12-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
PUR
T
P
86
85
30
L
ORN
DK BLU/WHT
H
DK BLU
RED/WHT
12 PIN
HARNESS TYPE:
D
HEADLAMPS:
87
87A
HEADLAMP KIT:
HB3/HB4
DRLs:
YES
(Automatic, DRL kit not required)
DK BLU (GND)
ORN (LOW)
FROM
VEHICLE HEADLAMP
CONNECTORS
GRN/WHT (HIGH)
DK BLU/WHT 87A
BLK 87
PNK 86
BLK/ORN
RIGHT SIDE
LOW BEAM
RELAY
LT BLU
PNK
LT BLU
RED 87A
LT BLU/ORN 87
LT BLU/WHT 87A
BLK/WHT 87
BRN
GRY
80
LOCATED UNDER DASH
30
GRN/WHT
85
BLK/ORN
RIGHT SIDE
HIGH BEAM
RELAY
LOCATED NEAR BATTERY
30
GRN
85
BLK/ORN
30
LT BLU
85
TAN
LEFT SIDE
HIGH BEAM
RELAY
BRN/RED
#6 BLK
#6 RED
LEFT SIDE
LOW BEAM
RELAY
PNK
PNK 86
LT BLU/WHT
YEL
BRN/RED 4
LT BLU 5
MTR RLY
PNK
RED
Lit. No. 22373, Rev. 07
85
#6 BLK/RED
ORN/BLK
PNK 86
62914-97
DK BLU
RED 1
LT GRN 2
ORN/BLK 3
WHT
PNK 86
LOCATED AT
FRONT OF VEHICLE
L
30
RED
IGNITION
WHT/YEL 6
RED/WHT 87A
DK BLU/ORN 87
#6 BLK/RED
#6 BLK
H
SFE6
12V BATTERY
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
LT BLU
1
2
3
4
5
6
7
8
9
10
11
12
BLK/ORN
PUR
BROWN WIRES
NOT USED
ON DRL VEHICLES
PUR
DK BLU (GND)
YEL (LOW)
LT BLU (GND)
GRN (HIGH)
LT BLU (GND)
FROM
VEHICLE HEADLAMP
CONNECTORS
NOTE: All relays are shown in the
de-energized state.
P
T
November 1, 2008
12-PIN HARNESS
VEHICLE SIDE
Headlamp Relay
Terminal Locations
PUR
T
P
85
30
PS PLOW
POWER
RELAY
RED
DK BLU
H
L
ORN
PUR
87A
DK BLU/ 87
ORN
PNK 86
30
1
2
3
4
5
6
7 BLK WHT
8 DK BLU/ORN
GRY
9
PUR
10
BRN
11
12 LT BLU/ORN
LT BLU 87A
/ORN 87
PNK 86
BLK
ORN 87A
87
85 TAN
30
ORN
DK BLU
RED
YES
BRN/RED 4
LT BLU 5
RED
86
30
YEL
85
BLK/
ORN
RED 87A
WHT 87
30
GRN
TAN 86
85
BLK/
ORN
HIGH BEAM
RELAY
RED
IGNITION
81
WHT/YEL 6
LOCATED UNDER DASH
RED
LOCATED NEAR BATTERY
MTR RLY
#6 BLK/RED
ORN/BLK
#6 RED
BRN/RED
#6 BLK
YEL (LOW)
DK BLU (COM)
GRN (HIGH)
FROM
VEHICLE HEADLAMP
CONNECTOR
13607-98
63103-91
NOT USED
GRY
P
T
DRLs:
RED 1
LT GRN 2
ORN/BLK 3
LOW BEAM
RELAY
BRN
H
SFE6
85 BLK/
#6 BLK/RED
LOCATED AT
FRONT OF VEHICLE
HB1
RED
ORN
#6 BLK
HEADLAMPS:
FROM
VEHICLE HEADLAMP
CONNECTOR
DS PLOW
POWER RELAY
TAN
L
GRN (HIGH)
DK BLU (COM)
YEL (LOW)
PUR
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
F
KEYED POWER SOURCE
BLK/
WHT
86
87A
HARNESS TYPE:
12V BATTERY
87
HEADLAMP KIT: 12 PIN
NOTE: All relays are shown in the
de-energized state.
Lit. No. 22373, Rev. 07
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT: 12 PIN
VEHICLE SIDE
HARNESS TYPE:
T
P
PUR
Headlamp Relay
Terminal Locations
87
86
87A
DK BLU
LT BLU/ORN
DK BLU
LT BLU/ORN
85
FROM
VEHICLE HEADLAMP
CONNECTOR
F
HEADLAMPS:
HB5
DRLs:
YES
(NOT USED)
30
KEYED POWER SOURCE
PS PLOW
POWER RELAY
H
L
ORN
PUR
87A
DK BLU/ORN 87
PNK
30
RED
85 TAN
86
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
87A
87
BLK WHT
BLK WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
PNK 86
FROM
VEHICLE HEADLAMP
CONNECTOR
DK BLU (COMMON)
YEL (LOW)
SFE6
PUR
1
2
3
4
5
6
7
8
9
10
11
12
GRN
30
RED
85
BLK/
ORN
ORN 87A
BLK 87
30
YEL
TAN 86
85
BLK/
ORN
#6 BLK/RED
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
DS PLOW
POWER
RELAY
BRN/RED 4
LT BLU 5
82
WHT/YEL 6
15 A
LOCATED UNDER DASH
RED
15 A
LOCATED NEAR BATTERY
LOW BEAM
RELAY
MTR RLY
#6 BLK/RED
ORN/BLK
#6 BLK
#6 RED
BRN
LOCATED AT
FRONT OF VEHICLE
L
ORN
DK BLU
RED
13607-98
63103-91
Lit. No. 22373, Rev. 07
P
T
GRY
DK BLU
LT BLU/ORN
BRN
GRY
GRY
GRY
RED 87A
WHT
GRY
H
BRN/RED
#6 BLK
NOT USED
87
TAN 86
HIGH BEAM
RELAY
BLK
RED
PUR
30
GRN
85
BLK/
ORN
12V BATTERY
RED
DK BLU
YEL (LOW)
GRN (HIGH)
DK BLU (COMMON)
DK BLU
LT BLU/ORN
TO PARK TURN
HEADLAMP
ASSEMBLY
FROM
VEHICLE HEADLAMP
CONNECTOR
FROM
VEHICLE HEADLAMP
CONNECTOR
(NOT USED)
NOTE: All relays are shown in the
de-energized state.
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT: 12 PIN
VEHICLE SIDE
T
P
PUR
Headlamp Relay
Terminal Locations
FROM OUTER
VEHICLE HEADLAMP
CONNECTOR
HB-5 (9007)
DK BLU (COM)
LT BLU
FROM INNER
VEHICLE HEADLAMP
CONNECTOR
HB-1 (9004)
87
86
87A
RED
DK BLU
ORN
H
L
85
PUR
30
DK BLU
PLOW
LOW BEAM
RELAY
87A
DK BLU/ 87
ORN
PNK 86
PUR
H
L
PNK
LT BLU/
ORN
HARNESS TYPE:
GRN
DK BLU (COM)
YEL
HEADLAMPS:
DRLs:
F
HB1/HB5
YES
KEYED POWER SOURCE
30
15 A
85
TAN
30
RED
85
TAN
RED
15 A
87A
LT BLU/ 87
ORN
PNK 86
LT BLU/ 87A
ORN 87
BLK WHT
DK BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
TAN 86
30
LT
BLU
85
TAN
83
BRN/RED 4
LT BLU 5
INNER BEAM
RELAY
WHT/YEL 6
LOCATED UNDER DASH
30
YEL
TAN 86
85
BLK/
ORN
LOW BEAM
RELAY
LOCATED NEAR BATTERY
MTR RLY
#6 BLK/RED
ORN/BLK
TAN
LOCATED AT
FRONT OF VEHICLE
RED 87A
WHT 87
30
TAN 86
85
GRN
BLK/
ORN
HIGH BEAM
RELAY
LT BLU/
ORN
DK BLU
BRN/RED
#6 BLK
LT BLU
DK BLU (COM)
#6 RED
12V BATTERY
ORN 87A
BLK 87
#6 BLK
L
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
#6 BLK/RED
H
SFE6
TAN
1
2
3
4
5
6
7
8
9
10
11
12
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
PLOW
HIGH BEAM
RELAY
FROM INNER
VEHICLE HEADLAMP
CONNECTOR
HB-1 (9004)
NOT USED
ORN
L
DK BLU (COM)
RED
GRN (HIGH)
13607-98
63103-91
Lit. No. 22373, Rev. 07
P
T
FROM OUTER
VEHICLE HEADLAMP
CONNECTOR
HB-5 (9007)
NOTE: All relays are shown in the
de-energized state.
GRY
BRN
H
YEL (LOW)
DK BLU
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT: 12 PIN
VEHICLE SIDE
HARNESS TYPE:
HEADLAMPS:
HB5
DRLs:
NO
PUR
T
P
G
PS LOW BEAM
RELAY
ORN/WHT 87A
BLK 87
TAN 86
30
YEL/WHT
85
TAN
87
SFE6
PUR
BLK/WHT
NOT USED
PUR
ORN/WHT
1
2
3
4
5
6
7
DK BLU/ORN
8
9 GRY
PUR
10
BRN
11
LT BLU/ORN
12
PS HI BEAM RELAY
RED/WHT 87A
GRN/WHT
DK BLU/ORN
87
TAN
TAN 86
30
85
TAN
DS LOW BEAM RELAY
ORN 87A
30 YEL
BLK/WHT 87
TAN 86
85
TAN
WHT
MTR RLY
PUR
PUR
PUR
PUR
BRN/RED
#6 BLK
BRN
86
BLK
RED
GRY
GRY
30
GRN
85
BLK/ORN
#6 RED
BLK/ORN
RED 87A
LT BLU/ORN 87
84
LOCATED NEAR BATTERY
TAN
BRN
BLU
L
RED
BLU
ORN
85
30
WHT/YEL 6
#6 BLK
GRY
87A
LOCATED UNDER DASH
#6 BLK/RED
ORN/BLK
LOCATED AT
FRONT OF VEHICLE
86
BRN/RED 4
LT BLU 5
#6 BLK/RED
H
RED
IGNITION
RED 1
LT GRN 2
ORN/BLK 3
TAN
(JUMPER)
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
(JUMPER)
L
Headlamp Relay
Terminal Locations
GRN/WHT
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL/ WHT
12V BATTERY
RED/WHT
DK BLU
BLK/ORN
H
BRN
YEL (LOW)
DS HIGH BEAM
RELAY
GRN (HIGH)
BLU (COM)
FROM
VEHICLE HEADLAMP
CONNECTOR
P
T
Lit. No. 22373, Rev. 07
GRY
BLK/ORN
November 1, 2008
12-PIN HARNESS
HEADLAMP KIT: 12 PIN
VEHICLE SIDE
HARNESS TYPE:
PUR
T
P
RED/WHT
DK BLU
PS LOW BEAM
RELAY
ORN/WHT 87A
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
1
2
3
4
5
6
7
DK BLU/ORN
8
9 GRY
PUR
10
BRN
11
LT BLU/ORN
12
BLK 87
PNK 86
30
YEL/WHT
85
TAN
YES
Headlamp Relay
Terminal Locations
87
SFE6
RED
IGNITION
86
PNK 86
30
85
TAN
DS LOW BEAM RELAY
ORN 87A
30 YEL
BLK/WHT 87
85
LOCATED NEAR BATTERY
TAN
MTR RLY
#6 BLK
PUR
PUR
RED 87A
LT BLU/ORN 87
TAN
86
BLK
RED
GRY
GRY
30
GRN
85
BLK/ORN
BRN/RED
#6 BLK
#6 RED
BLK/ORN
TAN
BLU
RED
BLU
ORN
(JUMPER)
WHT
PUR
PUR
GRY
85
WHT/YEL 6
LOCATED UNDER DASH
#6 BLK/RED
ORN/BLK
LOCATED AT
FRONT OF VEHICLE
85
30
12V BATTERY
DK BLU/ORN 87
87A
ORN/BLK 3
BRN/RED 4
LT BLU 5
TAN
(JUMPER)
PS HI BEAM RELAY
RED/WHT 87A
GRN/WHT
#6 BLK/RED
L
DRLs:
RED 1
LT GRN 2
PNK 86
H
HB5
GRN/WHT
FROM
DK BLU (COM) VEHICLE HEADLAMP
CONNECTOR
YEL/ WHT
PUR
BLK/WHT
NOT USED
PUR
ORN/WHT
L
HEADLAMPS:
KEYED POWER SOURCE
BLK/ORN
H
G
BRN
YEL (LOW)
DS HIGH BEAM
RELAY
GRN (HIGH)
BLU (COM)
FROM
VEHICLE HEADLAMP
CONNECTOR
P
T
Lit. No. 22373, Rev. 07
GRY
BLK/ORN
NOT USED
November 1, 2008
12-PIN HARNESS
VEHICLE SIDE
HEADLAMP KIT: 12 PIN
T
P
PUR
PLOW DRL
MODULE
ORN/WHT
L
YEL/WHT
DK BLU
DK BLU
HARNESS TYPE:
H
HEADLAMPS:
HB3/HB4
DRLs:
YES
Headlamp Relay
Terminal Locations
FROM VEHICLE HEADLAMP CONNECTORS
DK BLU
TAN
(JUMPER 3-WAY)
RED
DK BLU
PUR
RED/WHT
H
BLK
GRN/WHT
YEL/WHT
ORN/WHT
87
GRN/WHT
DRL LAMP
DK BLU
WHT/YEL
87a
86
BLK
LT GRN
LT BLU
BLK/ORN
WHT
BLK/WHT
DKBLU/ORN
GRY
PUR
BRN
LTBLU/ORN
BLK/WHT
NOT USED
30
87
85
#1
87a
BLK
87
BRN
86
SFE6
IGNITION
#2
RED
LT GRN
ORN/BLK
BRN/RED
LT BLU
WHT/YEL
PASSENGER SIDE
LOW BEAM RELAY
TAN
(JUMPER)
TAN
(JUMPER)
87a
30
87
85
86
#5
RED
15 AMP
FUSE HOLDER
#4
MTR RLY
BRN/RED
#6 RED/BLK
87a
30
87
#6 RED
ORN/BLK
RED
86
DRIVER SIDE
HIGH BEAM
RELAY
85
PLOW DRL
LOW BEAM
RELAY
DRIVER SIDE
LOW BEAM
RELAY
86
DRL LAMP
1
2
3
4
5
6
RED
86
#3
RED
85
GRN
RED
30
87
TAN
(JUMPER 3-WAY)
TAN
(JUMPER)
86
DK BLU
87a
30
87
BLK/ORN
87a
BLK/WHT
LTBLU/ORN
85
TAN
(JUMPER)
YEL
ORN
BLK/ORN
87A
30
85
BRN
#6 BLK/RED
#6 BLK
86
RED
30
BRN
PASSENGER
SIDE HIGH
BEAM RELAY BRN
BRN
1
2
3
4
5
6
7
8
9
10
11
12
RED/WHT
DK BLU/ORN
RED
#6 BLK
85
#6
RED
BLK/ORN
PLOW DRL
POWER RELAY
(JUMPER w/DIODE)
H
RED
GRN
DK BLU
DK BLU
ORN
L
BRN
GRY
FROM VEHICLE HEADLAMP CONNECTORS
YEL
DK BLU
DK BLU
P
T
Lit. No. 22373, Rev. 07
November 1, 2008
MVP® ELECTRICAL SCHEMATIC
PLOW ASSEMBLY
RIGHT SIDE PLOW LAMP
PUR
T
BRN
P
P/T SIG
PUR
PUR
BRN
BRN
T
P
HEADLAMP
See specific wiring schematic
for proper relay wire connections.
WHT
H
BLK/ORN
BLK
L
BLK/ORN
(GROUND)
WHT (HIGH BEAM)
BLK (LOW BEAM)
S1 SOLENOID
WHT/YEL
S2 SOLENOID
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
LT BLU
S3 SOLENOID
LT GRN
S4 SOLENOID
WHT
BLK/WHT
BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
BLK/WHT
S5 SOLENOID
BLU/ORN
S6 SOLENOID
LT BLU/ORN
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
WHT/YEL
BLK
LT GRN
LT BLU
BLK/ORN
10AFB
LT BLU/ORN
BLU/ORN
WHT
BLK/WHT
BLU/ORN
GRY
PUR
BRN
LT BLU/ORN
BLK/WHT
LT GRN
LT BLU
WHT/YEL
BRN/RED
RED
RED
#6 BLK
BLK/ORN
PUMP MOTOR
M
+
RED
#6 RED
RED
RED
#6 RED
1
1
2
2
3
3
4
#6 BLK
RED
#6 RED
4
ORN/BLK
RED
BRN/GRN
RED
BLK
BLK/ORN
WHT
L
H
HEADLAMP
BRN
BRN
RED
GRY
P
T
P/T SIG
1
1
2
2
3
3
4
5
6
7
VIO
GRY
WHT
4
ORN
5
BLU
6
GRN
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
LOCATED UNDER DASH
YEL
RED
TAN
BRN
BLK
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
F2
7
8
9
F1
10
11
**REPRESENTATION
OF PRINTED
CIRCUIT BOARD
COIL CORD HARNESS
ORN/BLK
LOCATED NEAR BATTERY
MTR RLY
#6 RED
BRN
BRN/GRN
P
T
#6 RED
#6 BLK
#6 BLK
** HAND HELD
CONTROL
RED
LEFT SIDE PLOW LAMP
Lit. No. 22373, Rev. 07
#6 BLK
BRN/RED
#6 RED
12V BATTERY
–
RED
IGNITION
November 1, 2008
87
MVP® ELECTRICAL SCHEMATIC – For 2003 GM and Dodge
PLOW ASSEMBLY
S1 SOLENOID
WHT/YEL
WHT/YEL
S2 SOLENOID
LT BLU
LT GRN
LT BLU
S3 SOLENOID
LT GRN
S4 SOLENOID
BLK/WHT
BLK/WHT
BLU/ORN
S5 SOLENOID
BLU/ORN
S6 SOLENOID
LT BLU/ORN
LT BLU/ORN
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
WHT/YEL
10AFB
LT GRN
LT BLU
LT BLU/ORN
BLU/ORN
BLK/WHT
BLK/WHT
BLU/ORN
LT GRN
LT BLU
WHT/YEL
BRN/RED
LT BLU/ORN
RED
RED
#6 BLK
PUMP MOTOR
–
M
+
#6 RED
RED
IGNITION
RED
RED
RED
#6 RED
#6 BLK
1
2
1
2
3
4
RED
3
#6 RED
4
ORN/BLK
RED
BRN/GRN
RED
#6 BLK
#6 RED
#6 BLK
1
2
** HAND HELD
CONTROL
3
4
4
6
GRY
WHT
ORN
5
BLU
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
LOCATED UNDER DASH
VIO
2
3
5
YEL
1
GRN
RED
TAN
BRN
BLK
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
F2
7
8
9
F1
10
11
**REPRESENTATION
OF PRINTED
CIRCUIT BOARD
COIL CORD HARNESS
ORN/BLK
MTR RLY
#6 RED
BRN/GRN
#6 BLK
BRN/RED
Lit. No. 22373, Rev. 07
#6 RED
12V BATTERY
LOCATED NEAR BATTERY
November 1, 2008
88
WIRING DIAGRAM – 61185 PARK OR TURN HARNESS KIT
Cab Marker / Park Lamps Application
Turn Signal Application
Attach to Vehicle Battery
Positive Terminal or Motor
Relay Positive Connection.
To Black Bullet
Receptacle Connector
on Left Turn Signal
Wire of Vehicle
Attach to Vehicle Battery
Positive Terminal or Motor
Relay Positive Connection.
To Black Bullet
Receptacle Connector
on Park Light Wire
of Vehicle
BK
87
30
Left Turn
Signal Relay
85
R
R
Right Turn
Signal Relay
86
87a
85
BK
87a
87
30
87
PU
30
Left Turn
Signal Relay
Lit. No. 22373, Rev. 07
PU
R
BK
GY
PU
86
Insert Plow Vehicle
Harness Brown
Wire Bullet
(Power to Plow
Park Light Bulbs)
R
85
87a
R
BK
R
86
87
87a
To Purple wire
Receptacle on
Plug-In Headlamp
Harness
(Other end
Plug-In Harness
Purple Wire Bullet
to Black Receptacle
Connector on Right
Turn Signal Wire
of Vehicle.)
GY
PU
R
BK
GY
30
GY
Insert Plow Vehicle
Harness Gray
Wire Bullet
(Power to Plow
Light Left Turn
Signal Bulbs)
Insert Park or
Turn Harness
Purple Wire Bullet
into Purple Wire
Receptacle
(This circuit is
not used in this
application.)
PU
R
BK
FUSE 10 A
R
Insert plow vehicle
harness Purple
Wire Bullet
(Power to Plow
Light Right Turn
Signal Bulbs)
Attach to Vehicle Battery
Negative Terminal
FUSE 10 A
Attach to Vehicle Battery
Negative Terminal
85
86
R
Right Turn
Signal Relay
November 1, 2008
89
ELECTRICAL LEGEND AND WIRE COLORS
Wire Color Code
Electrical Legend
CROSSING WIRE
WIRE SPLICE
IN LINE CONNECTOR
RING TERMINAL
FUSE
S1 = SV08-2004
SOLENOID S2 = SV08-30
S3 = SV08-40
BLK
BLK/ORN
BLK/RED
BLK/WHT
BLU
BLU/ORN
BRN
BRN/RED
DKBLU
DKBLU/ORN
DKBLU/WHT
GRN
GRN/WHT
GRY
Black
Black w/Orange
Black w/Red
Black w/White
Blue
Blue w/Orange
Brown
Brown w/Red
Dark Blue
Dark Blue w/Orange
Dark Blue w/White
Green
Green w/White
Gray
LTBLU
LTBLU/ORN
LTBLU/WHT
LTGRN
ORN
ORN/BLK
PNK
PUR
RED
TAN
WHT
WHT/YEL
YEL
Light Blue
Light Blue w/Orange
Light Blue w/White
Light Green
Orange
Orange w/Black
Pink
Purple
Red
Tan
White
White w/Yellow
Yellow
DIODE
90
CIRCUIT GROUND
MOTOR RELAY
Abbreviations
DRL
Daytime Running Lights
MTR RLY
Motor Relay
BATTERY
–
M
+
MOTOR
PARK / TURN LAMP
HEADLAMP
Harness Type
A
B
C
D
E
F
G
H
Description
Common Ground to Headlamps
GM DRL System
Independent Ground to Headlamps
GM Enhanced DRL System
Not Used
Common 12V to Headlamps
Headlamp Timer Module
Independent Headlamp, Common Ground
COMPONENT ENCLOSURE
Lit. No. 22373, Rev. 07
November 1, 2008
Western Products
PO Box 245038
Milwaukee, WI 53224-9538
www.westernplows.com
A DIVISION OF DOUGLAS DYNAMICS, L.L.C.
Copyright © 2008 Douglas Dynamics, L.L.C. All rights reserved. This material may not be reproduced or copied, in whole or in part, in any printed, mechanical, electronic, film or other distribution and
storage media, without the written consent of Western Products. Authorization to photocopy items for internal or personal use by Western Products outlets or snowplow owner is granted.
Western Products reserves the right under its product improvement policy to change construction or design details and furnish equipment when so altered without reference to illustrations or specifications
used. Western Products or the vehicle manufacturer may require or recommend optional equipment for snow removal. Do not exceed vehicle ratings with a snowplow. This product is manufactured under
the following U.S. patents: 4,999,935; 5,420,480; 5,638,618; 5,899,007; 6,145,222; 6,209,231; 6,253,470; 6,408,549; 6,526,677; 6,928,757; 6,941,685; RE35,700; CAN patent 2,060,425; 2,184,922;
2,229,783; 2,354,257 and other patents pending. Western Products offers a limited warranty for all snowplows and accessories. See separately printed page for this important information. The following
are registered (®) or unregistered (™) trademarks of Douglas Dynamics, L.L.C.: FloStat ®, MVP ®, MVP PLUS™, PRO-PLOW®, PRO PLUS ®, Roll-Action™, UltraMount ®, WESTERN ®, WIDE-OUT™.
Printed in U.S.A.
Lit. No. 22373, Rev. 07
November 1, 2008