B29818
PO Box 245038, Milwaukee, WI 53224‑9538 • www.blizzardplows.com
November 15, 2013
Lit. No. 43857, Rev. 00
B29818 Harness Kit
Installation Instructions
NOTE: Follow the instructions included with your
snowplow assembly until prompted to install the
main lighting harness. At that point, follow the
instructions in this document, then return to the
snowplow assembly instructions to complete
installation of the vehicle wire harness, light tower,
headlamps and control, and perform final testing.
ISOLATION MODULE MOUNTING
CAUTION
Before installing self-drilling screws or drilling
mounting holes, check the selected mounting
area for any wires, hoses or other obstructions.
Install the 3-port isolation module over the rectangular
opening on the driver's side of the inner fender using
the screws provided in the plug‑in harness kit.
HARNESS INSTALLATION
Plug‑In Harness
1. Vehicles with HB-3/H11/H1R2 Headlamps:
Remove the headlamp connectors. Connect the
plug‑in harness to the mating connectors removed
from the headlamps. Connect the plug‑in harness
to the mating connections at the headlamps.
2. Route the plug‑in harness to the isolation module.
Connect the plug‑in harness to the module by
matching harness connector B with module port B
and harness connector C with module port C.
Vehicle Lighting Harness
3. Position the vehicle lighting harness with both
snowplow headlamp connectors near the grille of
the vehicle.
4. Route the harness around or through the radiator
bulkhead to the isolation module. Connect the
harness and 28027-2 Adapter according to the
instructions in the 28027-2 Adapter Kit.
Adapter
1. Plug the B29681 2-pin adapter connector into the
mating 2-pin connector on the vehicle harness.
Mount isolation
module over
opening in
inner fender on
driver's side.
2. Route the adapter 4-pin connector to the plug‑in
harness and connect it to the plug‑in harness
4-pin connector.
3. Route the red adapter wire with ring terminal to the
battery. Connect it to the POSITIVE (+) terminal.
4. Route the second red wire to a switched accessory
and connect. Shorten or lengthen the wire as needed.
A DIVISION OF DOUGLAS DYNAMICS, LLC
B29818
Securing Wires and Cables
TURN SIGNAL CONFIGURATION PLUG
Secure the adapter, harnesses and cables to the vehicle,
safely routing them away from sharp, hot or moving parts.
WARNING
If the turn signal configuration plug is mated
incorrectly, the turn signals will be reversed
between the vehicle and the snowplow.
Position the snowplow headlamp connectors from the
vehicle lighting harness in a location that is accessible
from the grille, then cable tie them to the vehicle to prevent
them from hanging too low.
1. Mate the turn signal configuration plug located on
the plug-in harness so that the wire colors match
(green to green and blue to blue).
2. Connect the single-wire connector from the
vehicle lighting harness to the single-wire
connector from the plug-in harness.
Single-Wire
Connectors
Turn Signal
Configuration
Plug
B – Green & Red Wires
C – Blue & Red Wires
Driver-Side Module
Passenger-Side Module
GRN
GRN
BLU
GRN
BLU
BLU
GRN
BLU
3. The pink wires with plugs on the 69817 plug‑in
harness are not currently used. Plug them
together for storage.
Lit. No. 43857, Rev. 00
2
November 15, 2013
3
Park/Turn
Lamps
Vehicle
Headlamps
6-Pin
Snowplow
Headlamp
Connectors
Vehicle
Headlamps
BLK
(24")
2-Pin Headlamp
Connector
Vehicle Lighting
Harness (PN B29680)
Pink wires and plugs on the 69817
Plug-In Harness not currently used.
Plug together for storage.
Fuse Holder
To Snowplow
Control
To Switched
Accessory
Fire
Wall
3-Port Module
(PN 29760-1)
To Negative
Battery Terminal
In-Line
Adapter
(PN 28027-2)
10.0-Amp Fuse
(Snowplow Park/Turn)
Turn Signal
Configuration Plug
Fuses
Battery
Battery
Cable
To Switched
Accessory
BRN/WHT
Power
Contactor
(Solenoid)
Adapter (PN B29681)
Factory Vehicle Harness
4-Pin Plug-In
Harness
Connector
Plug-In
Harness
(PN 69817)
Vehicle Control Harness
To
Ground
Factory Vehicle Harness
RED
Lit. No. 43857, Rev. 00
RED
BLK
RED
WIRING DIAGRAM
RED
Park/Turn
Lamps
B29818
November 15, 2013
B29818
Blizzard 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. Blizzard or the vehicle manufacturer may require or recommend optional equipment
for snow removal. Do not exceed vehicle ratings with a snowplow. Blizzard offers a limited warranty for all snowplows and accessories. See
separately printed page for this important information. The following is a registered (®) trademark of Douglas Dynamics, LLC: BLIZZARD ®.
Printed in U.S.A.
Lit. No. 43857, Rev. 00
4
November 15, 2013