INTERACTIVE SCHEMATIC
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Information
Component Table
Tap Table
Fluid Power Symbols
Electrical Symbols
Schematic
Machine Views
Front Frame
Rear Frame
Tap Views
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HOTKEYS (Keyboard Shortcuts)
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SENR9149-03
March 2006
12H, 140H, and 160H
Motor Grader Standard Version
Electrical System
12H:
4ER500-1135
140H:
8JM280-UP
5HM1150-2999
© 2006 Caterpillar, All Rights Reserved
160H:
9JM350-UP
2FM400-908
Printed in U.S.A.
COMPONENT LOCATION
Component
12V Power Port
Schematic
Location
F-9
Machine
Location
32
Component
Sender - Articulation
Schematic
Location
C-12
Machine
Location
7
24 to 12 volt converter
F-13
8
Sender - Engine Coolant Temperature
B-14
11
Alarm-Action
B-9
C
Sender-Engine Oil Pressure
B-13
13
Alarm - Backup
F-15
1
Sender- Transmission Speed
D-15
14
Alternator
D-14
2
Solenoid-Centershift
B-3
16
Arc Suppressor
E-14
17
Solenoid - Differential Unlock
E-14
17
Battery 1
C-14
3
Solenoid-Dual Horsepower
A-13
5
Battery 2
C-14
4
Solenoid - Engine Shutdown
D-13
5
Breaker - Alternator
D-13
5
Solenoid - Forward Horn
A-3
16
Breaker - Headlamp
D-10
B
Solenoid - Park Brake
B -12
16
Control - Neutral Start
B-9
10
Solenoid - Start Aid
A-13
18
Control - Transmission
A-7
E
Solenoids - Transmission Valves
E-15
14
Control - XMSN Direction and Speed SW
A-9
C
Switch - Beacon
B-6
C
Fuses (10A)
B-6
C
Switch - Blower (Heater Group)
A-10
C
Fuses Block
D-9
B
Switch - Brake Air Pressure
A-2
16
Gauge - Cluster
F-5
A
Switch - Centershift Indicator
B-3
19
Ground - Engine
C-13
12
Switch - Centershift Pin
B-9
C
Ground - Frame Cab
D-5
24
Switch - Coolant Temp (Start Aid)
A-14
11
Ground - Front Frame
D-6
21
Switch - Defrost, Front
A-6
C
Ground - Front,Rear Frame
B-12
20
Switch - Defrost, Rear
B-6
C
Ground - Rear Frame
C-13
28
Switch - Differential Unlock
D-9
B
Horn - Forward
F-3
16
Switch - Disconnect
C-14
13
Meter - Service
E-10
B
Switch - Flood Lamp
D-8
B
Motor - Blower
E-4
E
Switch - Forward Horn
E-9
B
Motor - Blower (Heater Group)
A-10
E
Switch - Fuel Pressure
B-13
13
Motor - Blower, Defroster
A-11
E
Switch - Head/Tail Lamp
E-8
B
Motor - Starter
C-13
5
Switch - Headlamp Dimmer
E-9
B
Motor - Washer, Front Lower
F-6
8
Switch - Inching Pedal Pressure
C-15
14
Motor - Washer, Front Upper
F-6
8
Switch - Key Start
B-9
C
Motor - Washer, Rear
F-5
8
Switch - Park Brake Pressure
B-11
16
Motor - Wiper, Front Lower
C-4
9
Switch - Start Aid
E-8
B
Motor - Wiper, Front Upper
D-4
D
Switch - Stop Lamp Pressure
A-2
16
Motor - Wiper, Aear
B-11
D
Switch - Tail Lamp
D-8
B
Relay - Start
D-13
5
Switch - Transmission Oil Temp Sensor
E-15
26
Relay - Transmission Action Lamp
C-10
8
Switch - Wiper, Front Lower
A-5
C
Resistor - Blower Speed 1
A-12
E
Switch - Wiper, Front Upper
B-5
C
Resistor - Blower Speed 2
E-4
E
Switch - Wiper, Rear
A-5
C
Resistor - Blower Speed (Heater Group)
A-10
E
Machine locations are repeated for components located close together.
A = Operator’s compartment (Dash).
B = Operator’s compartment (Steering console).
C = Operator’s compartment (Right side console).
D = Operator’s compartment (Headliner).
E = Operator’s compartment (Under seat).
CONNECTOR LOCATION
Schematic
Location
Machine
Location
CONN 1
D-15
26
CONN 2
E-15
26
CONN 3
E-15
31
CONN 4
F-14
22
CONN 5
F -14
22
CONN 6
A-14
5
CONN 7
A-14
30
CONN 8
B-13
29
CONN 9
B -13
29
CONN 10
D-13
29
CONN 11
D-13
29
CONN 12
B-12
25
CONN 13
A-11
C
CONN 14
B
23
CONN 16
D-10
D-10
D-10
CONN 17
A-9
10
CONN 18
10
CONN 19 Service Tool
A-9
A-9
CONN 20
B-9
25
CONN 21
B-9
25
CONN 22
E-9
23
CONN 23
B-8
10
CONN 24
B-8
10
CONN 25
E-6
24
CONN 26
E-6
24
CONN 27
C-6
24
CONN 28
C-6
24
CONN 29
C-6
27
CONN 30
A-6
27
CONN 31
C-5
27
CONN 32
C-5
27
CONN 33
B-3
15
CONN 34
E-3
23
CONN 35
F-3
23
CONN 36
F-3
23
CONN 37
E-9
B
Connector Number
CONN 15
23
C
¹ The connectors shown in this chart are for harness to harness connectors.
Connectors that join a harness to a component are generally located at or near the
component. See the Component Location Chart.
CID / MID / FMI
Transmission Diagnostic Code Conversion
Flash
Code
CID - FMI
11
N/A
12
N/A
Description
No diagnostics active
No logged diagnostic codes
21
641
F05 Transmission Solenoid A open circuit
22
642
F05 Transmission Solenoid B open circuit
23
643
F05 Transmission Solenoid C open circuit
24
644
F05 Transmission Solenoid D open circuit
25
645
F05 Transmission Solenoid E open circuit
26
646
F05 Transmission Solenoid F open circuit
27
647
F05 Transmission Solenoid G open circuit
28
648
F05 Transmission Solenoid H open circuit
31
641
F06 Transmission Solenoid A short to ground
32
642
F06 Transmission Solenoid B short to ground
33
643
F06 Transmission Solenoid C short to ground
34
644
F06 Transmission Solenoid D short to ground
35
645
F06 Transmission Solenoid E short to ground
36
646
F06 Transmission Solenoid F short to ground
37
647
F06 Transmission Solenoid G short to ground
38
648
F06 Transmission Solenoid H short to ground
41
641
F03 Transmission Solenoid A short to battery
42
642
F03 Transmission Solenoid B short to battery
43
643
F03 Transmission Solenoid C short to battery
44
644
F03 Transmission Solenoid D short to battery
45
645
F03 Transmission Solenoid E short to battery
46
646
F03 Transmission Solenoid F short to battery
47
647
F03 Transmission Solenoid G short to battery
48
648
F03 Transmission Solenoid H short to battery
52
637
F06 Backup alarm short to ground
58
688
F06 VHP solenoid short to ground
59
688
F03 VHP solenoid short to battery
61
668
F02 Shift lever input invalid
62
668
F03 Shift lever open/short to +battery
63
269
F00 Sensor supply voltage above normal
64
269
F01 Sensor supply voltage below normal
65
701
F02 Transmission output speed signal incorrect
68
168
F01 System voltage below normal
71
520
F02 Invalid transmission configuration code
72
268
F02 Check programmable parameters
73
764
F05 Transmission indicator lamp open circuit
74
764
F06 Transmission indicator lamp shortto ground
75
764
76
177
77
177
F03 Transmission indicator lamp shortto battery
Transmission oil temperture sendershort to
F03
+ battery or open circuit
F04 Transmission oil temperture switchshort to ground
81
868
F05 Auto/Manual lamp open circuit
82
868
F06 Auto/Manual lamp short tc ground
83
868
F03 Auto/Manual lamp short to +battery
SPECIFICATIONS AND RELATED MANUALS
Related Electrical Service Manuals
Title
Form Number
Alternator (6N-9294):
Consist No. 3T-6352
Consist No. 7N-9720
Consist No. 9G-4574
SENR4978
SENR2082
SENR4130
Alternator (100-5047):
Consist No. 100-5045
Consist No. 100-5046
SENR4130
SENR2082
Electronic Transmission Shift Control
SENR9167
Starting Motor: (106-8558)
Consist No. 106-8557
Consist No. 106-8559
SENR3559
SENR3581
Resistor, Sender and Solenoid Specifications
Part No.
Component Description
Resistance (Ohms)¹
3E-5383
Sender - Articulation Position
3 to 97
7N-8532
Sender - Engine Coolant
7T-4003
Resistor - Defroster
10.0 ± 0.5
7T-9073
Solenoid - Differential Unlock
33.6 ± 1.0
7T-9074
Solenoid - Forward HornPark Brake
55.17 ± 5.77
8C-3663
Solenoid - Engine Shutdown
Latch:
Unlatch:
8T-8808
Solenoid - Centershift
34.3 ± 1.7
9G-1950
Resistor-Blower Speed
Overall 2.00 ± .10 Tap 1.00 ± .05
9G-4365
Solenoid - Start Aid
104-6387
Sender - Transmission Speed
1000 to 1200
111-0570
Solenoid-Dual HP
31.1 ± 2.4
116-9937
Sender - Engine Oil Pressure
127-0574
Solenoid - Transmission
54°C (130°F) - 560 to 716
110°C (230°F) - 72 to 82
1.55 ± 0.1510.3 ± 1.03
6.00
21.5 - 49.5 @ 552 kPa (80.1 psi)
227 - 257 @ 21 kPa (3.0 psi)
31 ± 3
¹ At room temperature unless otherwise noted.
Off Machine Switch Specification
Part No.
Function
Actuate
Deactuate
Contact Position
5.0 kPa MIN
(0.5 psi MIN)
Normally Open
2M-9346
Stop Lamp Pressure
45.0 kPa Max
(6.5 psi Max)
8C-3569
Engine Coolant Temp (Start Aid)
37.8 ± 2.8°C
(100 ± 5°F)
26.7°C MIN
(80°F MIN)
Normally Closed
107-0611
Engine Oil Pressure
93.00 ± 21.00 kPa
(13.49 ± 3.05 psi)
70.00 ± 21.00 kPa
(10.15 ± 3.05 psi)
Normally Open
111-7088
Inching Pedal Pressure
75.0 kPa MAX
(10.9 psi MAX)
50.0 kPa MIN
(7.3 psi MIN)
Normally Open
112-2404
Brake/Park Brake Air Pressure
640 kPa MAX
(92.0 psi MAX)
530 ± 40 kPa
(77.0 ± 6.0 psi)
Normally Closed
HARNESS and WIRE
Electrical Schematic Symbols
Symbols
T
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Circuit Breaker
Symbol
Flow
Symbol
Symbols and Definitions
Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it.
Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has
screw terminals and a wire can be disconnected from it.
Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be
disconnected from the component.
Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.
Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the
machine.
Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it
opens the contacts of a normally closed reed switch.
T
Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its
resistance changes to give an indication to the gauge of the temperature or pressure.
Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet
when current flows through it. The electromagnet can open or close the switch part of the relay.
Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current
flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.
Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a
permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an
internal switch that places the latch coil circuit open at the time the coil latches.
Harness and Wire Symbols
Wire, Cable, or Harness Assembly Identification:
Includes Harness Identification Letters and Harness
Connector Serialization Codes (see sample).
Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
Harness Connector Serialization Code: The "C" stands for
"Connector" and the number indicates which connector in the
harness (C1, C2, C3, ...).
L-C12
3E-5179
AG-C4
111-7898
L-C12
3E-5179
1
Part Number: for
Connector Plug
Part Number: for
Connector Receptacle
2
Plug
Receptacle
Pin or Socket Number
5A
1
2
Deutsch connector: Typical representation
of a Deutsch connector. The plug contains all
sockets and the receptacle contains all pins.
1
2
Sure-Seal connector: Typical representation
of a Sure-Seal connector. The plug and receptacle
contain both pins and sockets.
Fuse (5 Amps)
9X-1123
Component
Part Number
325-AG135 PK-14
Harness identification code:
This example indicates wire group 325,
wire 135 in harness "AG".
Wire Gauge
Wire Color
6
135-BU
200-BK
AAA
200-BK
A
PK
GY
BU
WH
RD
BK
BR
PU
200-BK
L55
L55
L51
L54
L51
1
2
3
4
5
7
6
8
9
10
B
AAA
L69
L50
200-BK
614-PU
604-OR
L50
STOP/TAIL
LAMP
8C-6207
S
T
G
RD
WH
BK
1
3
2
CCC
604-OR
614-PU
200-BK
REAR FLOOD
LAMP
9X-6775
608-GN
200-BK
Y
HH Y
1 608-GN
2 200-BK
311-WH
310-PU
BK
BK
1
2
BK-18
BK-18
GN
GY
BR
OR
H
1
3
4
2
U
200-BK
504-YL
119-PK
503-BR
505-BU
L41
(D) REAR WIPER
9X-3392
L29
C491-PU
200-BK
L53
A
1
2
BK-18
BK-18
BEACON
9X-9556
2
1
H
(16) PARK BRAKE
PRESS SW
112-2404
L41
200-BK
603-PK
BULB
9X-7849
200-BK
AAA
1 311-WH
2 200-BK
HEATER GP
(E) REAR DEFROSTER
9X-9657
A507-YL
200-BK
(5) DUAL HORSEPOWER
SOLENOID
111-0570
AAA
2 BK
921-WH
1 BK
795-YL
H
BLOWER
9X-0343
1
2
RD
BK
(E) RESISTOR
9G-1950
MOTOR
H
(E) RESISTOR
7T-4003
(11) COOLANT SW
8C-3569
H
CONN 7
L41
A504-GN
A507-YL
200-BK
504-YL
119-PK
503-BR
505-BU
603-PK
L42
L20
200-BK
614-PU
CONN 13
1
2
5
4
3
14
13
12
498-WH
200-BK
3
5
1
4
2
X
522-WH
515-GY
200-BK
1
2
WH/RD-14
BK-14
MOTOR
G
PANEL LAMP
8D-1429
BASE
200-BK
7G-9730
614-PU
L20
11
10
609-YL
609-YL
A506-OR
A503-PK
L62
L16
C491-PU
308-YL
L65
L62
L25
U 2
F
3 U
117-9364
(24) CAB
GROUND
200-BK
L19
501-GN
118-GY
500-BR
502-OR
L19
LO
K
BK
1
3
4
2
200-BK
200-BK
CONN 28
3
1
2
4
6
7
5
8
9
K
152-BU
576-PK
577-PU
575-YL
507-WH
578-BU
506-PU
200-BK
L14
GND
MOTOR
T
B+
GN
GY
BR
OR
HI
WIRE GROUP COLOR DESCRIPTIONS
PARK
WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS ON.
VOLTAGE CONVERTER OUTPUT CIRCUIT.
STARTING CIRCUIT.
GROUND CIRCUIT.
STARTING AID CIRCUIT.
MONITOR CIRCUIT. (VIMS) / (CMS) / (EMS) / (OTHER)
TRANSMISSION CONTROL CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
WIPER/WASHER CIRCUIT.
L71
BAT +
GROUND
SOL 1 OUTPUT
SW 2 INPUT
SW 1 INPUT
SOL 2 OUTPUT
CONN 19
SERVICE
TOOL
CONNECTOR
9W-1951
1
2
3
4
5
6
F
307-OR
202-BK
306-GN
E949-YL
E948-BU
306-GN
SHIFT CONSOLE
9
CONN 23
921-WH
202-BK
202-BK
202-BK
E975-PU
M998-OR
795-YL
G
1
2
3
4
5
6
7
8
9
10
F
CONN 24
202-BK
202-BK
202-BK
307-OR
307-OR
306-GN
308-YL
308-YL
308-YL
308-YL
308-YL
CONN 18
F
LO
A
BK
1
3
4
2
GN
GY
BR
OR
A
L7
101-RD
L7
CONN 29
4K-5122 HOLDER AS.
3K-8782 FUSE
(C) FUSES (10A)
FFF
L
118-GY
10A
UPPER WIPER/WASHER
FFF
L
152-BU
10A
LOWER WIPER/WASHER
FFF
L
119-PK
10A
REAR WIPER/WASHER
FFF
L
141-PK
10A
FRONT DEFROSTER
FFF
L
151-GN
10A
REAR DEFROSTER
L
L
108-BU
101-RD
10A
DOME LAMP
L
101-RD
144-GN
10A
BEACON
L14
L62
L19
K
202-BK
308-YL
892-BR
893-GN
E947-WH
E948-BU
E949-YL
E937-PU
E938-OR
E939-WH
E940-BU
E941-YL
E942-GN
E943-BR
E944-GY
E945-PU
E946-OR
F843-YL
900-PU
902-BR
901-WH
903-GY
921-WH
M917-PK
G460-GN
M918-GN
E460-BR
321-BR
J2
11
7
8
1
2
3
29
18
23
28
40
37
12
10
19
20
25
4
5
6
17
9
22
15
24
26
27
14
21
30
31
32
33
34
35
36
13
38
39
16
F
J1
SOL RTN 7
INCH PEDAL
921-WH
SOLENOID 1 10 751-GN
SOLENOID 5
SOLENOID 2 4
752-YL
SOLENOID 7
SOLENOID 3 17 754-BU
SOLENOID 6
SOLENOID 4 11 755-OR
SOLENOID 8
28
SOL RTN
TOS + INP
33
36
TRANS TEMP
15
TOS - INP
202-BK
16
EMS OUT
27
308-YL
14
BU ALARM
+BATTERY 40 308-YL
+BATTERY 1
308-YL
+BATTERY 6
308-YL
202-BK
GROUND 2
202-BK
GROUND 5
KEY START SW. 34 307-OR
A/M LAMP 12 M998-OR
795-YL
VHP SOL 8
TRANS LAMP 18 E975-PU
32
DIA CODE 1 21 277-BK
DIA CODE 0 22 276-BK
DIA CODE 2 38 278-BK
892-BR
CAT LINK - 3
893-GN
CAT LINK + 9
RED NEUTR 26 E937-PU
FIRST 30 E938-OR
SECOND 24 E939-WH
THIRD 20 E940-BU
FOURTH 29 E941-YL
FIFTH 35 E942-GN
SIXTH 23 E943-BR
SEVENTH 19 E944-GY
EIGHTH 13 E945-PU
FORWARD 39 E946-OR
REVERSE 31 E947-WH
PARK 25 E948-BU
NEUTRAL 37 E949-YL
F
E948-BU
(E) TRANSMISSION CONTROL
E949-YL
132-2148 (MANUAL ONLY)
307-OR
306-GN
306-GN
CONN17
144-GN
614-PU
200-BK
614-PU
200-BK
L 2
L
L
L 2
L 5
118-GY
118-GY
L
614-PU
200-BK
L 2
L7
L 5
H
L20
2
7
5
3
6
1
8
4
L
200-BK
A507-YL
A504-GN
603-PK
119-PK
505-BU
503-BR
504-YL
502-OR
(C) REAR
DEFROST SW
9X-9638
584-YL
141-PK
(C) FRONT
DEFROST SW
9X-9638
501-GN
L9
L H
L L
3 L
584-YL
4
A503-PK
L
6
A506-OR
L11
152-BU
152-BU
577-PU
L H
576-PK
L L
(19) CENTERSHIFT
INDICATOR SW
3E-9367
L
439-YL
113-RD
L71
W
(C) FRONT
UPPER
WIPER SW
3T-6655
L
504-YL
503-BR
507-WH
CONN 30
CAB SWITCH AND FUSE PANEL
GN
GN
(16) CENTERSHIFT
SOLENOID
8T-8808
GN
GN
(16) FORWARD
HORN
SOLENOID
7T-9074
NOTE E
L
B B
P
L
W
114-RD
322-GY
(C) FRONT
LOWER
WIPER SW
3T-6655
A
1
2
200-BK
200-BK
H
619-GN
200-BK
B B
E458-YL
E458-YL
L L
P W
L
(C) REAR
WIPER SW
3T-6655
A
E458-YL 1
200-BK
2
BK-18
BK-18
A
E458-YL 1
200-BK
2
BK-18
BK-18
A
4
3
130-RD
604-OR
1
2
BK-18
BK-18
(16) BRAKE AIR SW
112-2404
L1
L1
611-PU
200-BK
L
L18
5
PART NO. CHG
LOC
LEVEL
HARNESS AS.
A
141-5445
AAA
143-2440
CCC
144-0373
E
144-0383
F
145-5999
G
142-5835
H
101-8161
J
142-0776
K
142-0731
01
00
00
00
00
00
02
01
00
(PLATFORM)
(ENGINE)
(RADIATOR GRILL)
(R FRAME)
(R FRAME-TRANS)
(XSMN CONSOLE)
(CAB-REAR)
(STEERING CONSOLE)
(CAB-FRONT)
L
M
N
P
FFF
U
V
X
Y
FFFF
AA
CC
JJJ
HH
00
01
02
00
01
01
02
00
00
02
00
02
01
03
180
(SW PANEL)
160
(GAUGE CONSOLE)
270
(TRANSMISSION)
100
(HEADLIGHTS-BAR)
183
(CAB FUSE PANEL)
(XSMN CONSOLE-SWITCHES) 171
271
(TRANS SPEED SENDER)
154
(HEATER GP)
230
(FUEL TANK)
121
(FORWARD HORN)
141
(HEADLAMP BREAKER)
106
(BLADE FLOOD LAMP)
205
(REAR FLOOD LAMP)
(REAR FLOOD LMP-FUEL TNK)206
WIRE AS.
NN
00
116-2145
GGGG 139-0071
00
LL
9F-4337 07 07
143
(HORN SWITCH)
(FUSE TO CIGAR LIGHTER)
(START MTR TO ENGINE)
CABLE AS.
KKK
116-9981
RR
145-8713
LLL
5C-6793
TT
139-0250
UU
061-7661
VV
7G-1060
MMM
1S-2342
210
(POS BAT TO START MTR)
(NEG BAT/DISCONNECT SW) 211
212
(DISCONNECT SW TO GND)
213
(NEG BAT TO POS BAT)
(START MTR TO FRAME GND) 214
(GND-R FRAME TO F FRAME) 204
(GND-F FRAME TO CAB)
105
142-0732
142-7533
137-1120
127-1036
127-1030
143-3580
104-8588
124-1429
144-0382
142-8470
115-9446
101-8190
101-8192
101-8193
00
00
00
00
03
00
02
120
220
203
201
202
170
182
140
181
NOTE
ATCH
ATCH
ATCH
ATCH
ATCH
D
ATCH
ATCH
ATCH
ATCH
ATCH
UNLESS OTHERWISE SPECIFIED: ALL WIRES IN A SPLICE
ARE THE SAME IDENT. NUMBER, COLOR, AND 16 GAUGE
WH-18
WH-18
BLADE
FLOOD
LAMP
9X-6775
L5
6
2
3
1
2
L20
7
1
4
CC
609-YL
200-BK
L5
8
WH-18
WH-18
CONN 33
A
F775-BU
200-BK
2
1
4
3
1
2
L3
L10
ATCH WIRE, CABLE &
COMPONENT
CIRCUIT GROUPING
DESIGNATION
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
AND XMSN SHIFTER IN NEUTRAL
119-PK
119-PK
505-BU
E
THIS IS THE SCHEMATIC FOR THE 12H,140H,
AND 160H STANDARD SERIES MOTOR GRADER
(145-5121 CHG 01)
A
P
L
L
L10
200-BK
200-BK
200-BK
L
L
B B
575-YL
578-BU
119-PK
119-PK
RED
WHITE
ORANGE
YELLOW
PINK
BLACK
GRAY
PURPLE
BROWN
GREEN
BLUE
C
A
500-BR
506-PU
3 L
584-YL
4
A504-GN
L
6
A507-YL
1
HI
COLOR
RD
WH
OR
YL
PK
BK
GY
PU
BR
GN
BU
PARK
L13
L7
L8
584-YL
151-GN
T
B+
CONN 32
L
1
MOTOR
K
L
(C) BEACON SW
9X-9639
3 L
603-PK
L
GND
(9) FRONT LOWER
WIPER
9X-3392
L7
L71
G
4
5
6
7
1
2
3
L71
L76
L76
576-PK
152-BU
575-YL
577-PU
L18
135-BU
101-RD-10
L46
202-BK
F F
1 202-BK
2 276-BK
202-BK
202-BK
3 277-BK
202-BK
4 278-BK
202-BK
202-BK
202-BK
(C) BLOWER SW
6P-3236
(C) TRANSMISSION
DIRECTION
AND SPEED SW.
8C-5337
A
FFF K
A
(10) NEUTRAL START CONTROL
24V CIGAR
LIGHTER
9W-0335
(E) BLOWER
9X-9363
ELECTRICAL CONNECTION
TO MACHINE STRUCTURE
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
CONNECTOR
108-BU
200-BK
200-BK-8
200-BK
K
ZZ
ZZ
101-RD-10
U
G
X
U
124-RD
124-RD
521-YL
515-GY
516-GN
517-BU
165-RD
F775-BU
GGGG
129-BU
200-BK
U
PANEL LAMP
(SHIFT LEVER)
7N-5876
NOTE B
(C) CENTERSHIFT
PIN SW
CIGAR LIGHTER
10A
K
604-OR
321-BR
9X-9634
200-BK
OFF C U
ON S U
ST B U
8C-9787
L20
15
L21
L43
200-BK
614-PU
200-BK
L42
R U
152-BU
576-PK
577-PU
575-YL
507-WH
578-BU
506-PU
614-PU
135-BU
L18
L71
200-BK
200-BK
200-BK
614-PU
614-PU
308-YL
E459-WH
9G-7641
U
(18) START AID
SOLENOID
9G-4365
1
2
(C) KEY START SW
(16) PARK BRAKE
SOLENOID
7T-9074
A
308-YL
1 GN
2 GN
200-BK
L71
U
CONN 21
CONN 20
RD
BK
A
U
9G-9813
AAA
A476-PU
T
JJJ HH
1
608-GN
2
200-BK
L36
L53
T
CONN 6
T
B+
BK
U
(C) ACTION ALARM U
CONN 8
(13) ENGINE OIL
PRESSURE
SENDER
116-9937
(11) COOLANT TEMP
SENDER
7N-8532
AAA
441-OR
BK
BU
PARK
L29
L43
L43
L42
2
1
L54
CONN 12
921-WH
614-PU
604-OR
321-BR
556-WH
200-BK
200-BK
H
L41
310-PU
311-WH
E458-YL
E459-WH
326-PU
311-WH
E458-YL
441-OR
A476-PU
E459-WH
795-YL
921-WH
GND
MOTOR
A
7
6
4
2
1
5
3
921-WH
614-PU
604-OR
321-BR
556-WH
200-BK
F743-YL
L6
308-YL
308-YL
308-YL
308-YL
308-YL
L36
CIRCUIT NOT CONNECTED
(D) FRONT UPPER
WIPER
9X-3392
200-BK-8
L7
L36
A
LO
HI
200-BK
(13) FUEL SW
107-0611
A
L54
AAA
E
L26
L7
4
1
2
3
L56
L56
(20) FRONT FRAME
E460-BR
308-YL
F743-YL
101-RD
124-RD
200-BK
614-PU
CONN 9
(20) REAR
FRAME
VV
2
1
3
8
5
6
4
7
101-RD
REAR
FRAME
A
Y
2 306-GN
3 310-PU
6 311-WH
1 403-GN
4 608-GN
5 202-BK
4
VV
L26
A
(8) TRANSMISSION ACTION
LAMP RELAY
106-9188
L52
200-BK-4
200-BK
200-BK
L43
(28) REAR
FRAME
TT
KKK
(4) 12V BATTERY NEG POS
3T-5760
113-RD
439-YL
CIRCUIT CONNECTED
L76
4
CONN 27
L46
(12) ENGINE
BLADE
FLOOD
LAMP
9X-6775
CC
609-YL
609-YL 1
200-BK
200-BK 2
ABBREV
OPERATOR STATION
UU
L36
A
DESCRIPTION
200-BK
LLL
308-YL
L38
611-PU
BLADE, SPADE, RING,
OR SCREW TERMINAL
K
L63
L44
L7
L36
L1
SYMBOL
CONN 34
L63
L7
L36
P
200-BK
200-BK
200-BK
200-BK
L4
L71
STEERING CONSOLE
L7
HI BEAM
HEADLAMP
9X-7170
L62
L76
L21
165-RD
165-RD
L29
P
IDENT
L4
(21) FRONT
FRAME
306-GN
795-YL
326-PU
E459-WH
200-BK
200-BK
611-PU
L#
L62
A
L38
P
L21
L62
L22
L38
FFFF
200-BK
200-BK
200-BK
200-BK
Y
C'SHIFT PIN
INDICATOR
M LAMP
7N-5876
NOTE B
439-YL
200-BK
200-BK
200-BK
(16) FORWARD
HORN
7T0969
NOTE E
LO BEAM
HEADLAMP
9X-7169
LAMP
7N-5876
NOTE B
L13
(3) 12V BATTERY
3T-5760
RD-00
LL
R/S SYSTEM
AIR PRESS
GAUGE
1W-3306
M
M
118-GY
118-GY
POS NEG
200-BK
200-BK
FFFF
F
619-GN
P
614-PU
614-PU
L8
RR
LLL
M
M
10
7
8
6
4
3
5
9
1
2
TT
RR
BK-00
BK-00
RD-00
BK-00
C
HI BEAM
INDICATOR
7N-5876
NOTE B
FFFF
114-RD
322-GY
1
2
619-GN
200-BK
K
L21
200-BK
200-BK
200-BK
200-BK-6
MOTOR
(E) RESISTOR
7T-4003
200-BK
BLADE
FLOOD
LAMP SW
123-5849
NOTE F
200-BK-6
202-BK
L67
BK-6
200-BK-10
UU
(13) DISCONNECT SW
7N-0718
M
LAMP
7N-5876
NOTE B
M
614-PU
614-PU
L63
(7) ART
SENDER
3E-5383
AAA
M
M
101-RD
507-WH
578-BU
506-PU
118-GY
501-GN
500-BR
502-OR
614-PU
200-BK
RD-00
3
M
L/S SYSTEM
AIR PRESS
GAUGE
1W-3306
L9
KKK
L22
M
M
RD
BK
1
2
A506-OR
L11
MOTOR
609-YL
608-GN
2
M
1
5
4
6
3
2
7
AAA
A
1 A429-YL
2 200-BK
K
A506-OR
200-BK
K
PARKING
BRAKE
LAMP
7N-5876
NOTE B
M
(E) BLOWER
9X-0343
200-BK
200-BK
200-BK
108-BU
A503-PK
A506-OR
152-BU
576-PK
575-YL
577-PU
MTR BAT
614-PU
301-BU-10
304-WH-10
AAA
101-RD-4
A
VOLTMETER
152-BU
152-BU
(14) INCHING PEDAL
PRESSURE SW
(TRANSMISSION)
111-7088
S
ENGINE OIL
PRESSURE
AIR
PRESSURE
LAMP
7N-5876
NOTE B
(B) FLOOD
LAMP SW
9X-9632
NOTE G
(B) DIFFERENTIAL
UNLOCK SW
123-5862
3J
556-WH
498-WH
1
GRD
119-PK
G
CONN 16
6
J
J
GRD
119-PK
(5) STARTER
106-8558
L63
J 5
SEND
611-PU
619-GN
200-BK
FRONT DEFROSTER
9X-9657
IGN
SEND
COLD
TEMP
LAMP
7N-5876
NOTE B
CONN 31
F843-YL
202-BK
L56
L23
3
4
4
1
2
5
3
6
7
101-RD
101-RD
101-RD
101-RD
101-RD
200-BK-4
L56
L67
L67
L55
614-PU
1 J 609-YL
J 2
GRD
TRANS
ACTION
LAMP
7N-5876
NOTE B
M
200-BK
200-BK
AAA
L55
AAA
200-BK-10
301-BU-10 GND
AAA START
614-PU
200-BK
200-BK
3 J
A
200-BK
200-BK
CONN 10 Y
LAMP
8M-6176
M
604-OR
130-RD
60A
STD Y
ATCH
J
614-PU
614-PU
200-BK
200-BK
J
165-RD 2
J
614-PU
200-BK
614-PU
(B) TAIL
LAMP SW
3E9319
J 2
A476-PU
200-BK
614-PU
611-PU
E975-PU
498-WH
M998-OR
439-YL
611-PU
E975-PU
J
J
GRD
IGN
200-BK
200-BK
200-BK
200-BK
L5
109-OR-4
403-GN
310-PU
200-BK
105-RD
130-RD
124-RD
113-RD
165-RD
608-GN
609-YL
L24
J
CONN 26
101-RD-4
101-RD-10
Y
10
9
8
1
3
2
4
6
5
7
L23
116-RD
6
J
614-PU
308-YL
F743-YL
9
3
2
7
1
5
8
6
4
F843-YL
900-PU
902-BR
901-WH
903-GY
M917-PK
G460-GN
M918-GN
751-GN
752-YL
754-BU
755-OR
921-WH
308-YL
202-BK
+
(5) SHUTDOWN
SOL
AAA
8C-3663
STOP
326-PU
CONN 15
J
200-BK
200-BK
J 5
441-OR
A429-YL
F473-YL
E458-YL
308-YL
C491-PU
439-YL
L26
ALT
A
101-RD-4
149-RD
J 2
L6
A
202-BK
200-BK
A429-YL
C491-PU
A476-PU
441-OR
E458-YL
202-BK
E975-PU
321-BR
795-YL
306-GN
307-OR
308-YL
E460-BR
R
40A
Y
(5) ALTERNATOR
BREAKER
2H-1507
STD
9S-0174
ATCH
A
114-RD
103-RD
149-RD
116-RD
165-RD
113-RD
124-RD
130-RD
105-RD
614-PU
200-BK
Y
Y
101-RD-4
J
1 101-RD-10
614-PU
200-BK
(B) HEADLAMP/
TAIL SW
1 3E-9317
3 J
619-GN
4
614-PU
D
E
A
B
C
F
G
H
J
F
CONN 11
A
FUSE (10A)
FUSE (15A) (B) FUSE BLOCK
9G-0747
J
10A J HORN
10A
TAIL LAMPS
J
10A
BLADE FLOODS
10A J REAR FLOODS
10A J DIFF LOCK
10A J
J GAUGES
15A J HEATER
10A
STOP LAMPS
101-RD-10
10A J KEY START SW
893-GN
892-BR
308-YL
202-BK
(2) ALTERNATOR
6N-9294 35A
100-5047 50A
F843-YL
202-BK
1
2
304-WH-10
Y
109-OR-4
403-GN
BK
BK
Y
103-RD
3K8782
8M8948
105-RD
307-OR
326-PU
308-YL
E459-WH
F775-BU
165-RD
CONN 1
Y
J
1
2
3
4
5
6
7
109-OR-10
M918-GN
M917-PK
L54
AA
308-YL
326-PU
307-OR
105-RD
F
(5) START
RELAY
3E-7279
103-RD
614-PU
200-BK
614-PU
200-BK
E937-PU
E938-OR
E939-WH
E940-BU
E941-YL
E942-GN
E943-BR
E944-GY
E945-PU
E946-OR
E947-WH
E948-BU
E949-YL
202-BK
M917-PK AND
M918-GN ARE
TWISTED PAIR
1
4
3
2
L54
L38
(B) HEADLAMP DIMMER SW
103-5678
619-GN
RED NEUT
FIRST
SECOND
THIRD
FOURTH
FIFTH
SIXTH
SEVENTH
EIGHTH
FORWARD
REVERSE
PARK
NEUTRAL
GROUND
(14) TRANS SPD
SENDER
104-6387
V
M918-GN
M917-PK
L53
J
308-YL
308-YL
308-YL
M917-PK AND
M918-GN ARE
TWISTED PAIR
Y
101-RD-4
101-RD-10
903-GY
921-WH
V
1
2
310-PU
306-GN
326-PU
795-YL
E459-WH
202-BK
306-GN
N
1
2
L65
J
SEND
P
CONN 35
310-PU
L24
614-PU
614-PU
200-BK
200-BK
102-BU
SEND
1
2
3
4
5
CONN 36
DIFF
UNLOCK
LAMP
7N-5876
NOTE B
M
L21
L56
902-BR
921-WH
556-WH
(14) SOL 8
127-0574
3 J
103-RD
619-GN
CONN 2
N
1
2
101-RD-4
(14) SOL 7
127-0574
611-PU
B
J 2
24
23
22
21
20
19
18
17
16
15
1
3
4
5
6
7
8
9
10
11
12
13
14
2
901-WH
921-WH
1
2
J 2
IGN
(24 V)
(12 V)
E458-YL
308-YL
200-BK
200-BK
(B) HEADLAMP
BREAKER
3T-2662
101-RD
N
1
L46
CONN 14
900-PU
921-WH
1
2
(14) SOL 6
127-0574
M917-PK AND M918-GN ARE TWISTED PAIR
L46
15A
N
751-GN
921-WH
752-YL
754-BU
755-OR
900-PU
921-WH
901-WH
902-BR
903-GY
1
2
1
9
2
3
4
5
10
6
7
8
755-OR
921-WH
102-BU
101-RD
N
1
2
(B) START AID SW
123-6375
CONN 25
F
N
A476-PU
200-BK
IGN
611-PU
619-GN
114-RD
322-GY
A
439-YL
200-BK
308-YL
(B) HORN SW
116-2145
(17) ARC SUPPRESSOR
106-8704
200-BK
754-BU
921-WH
614-PU J
200-BK J
ARTICULATION
(24 V)
(12 V)
614-PU
614-PU
L67
CONN 22
WH
RD
OR
PU
GN
GY
PK
YL
BK
COOLANT
TEMP
614-PU
200-BK
8
7
1
2
3
5
6
4
J
2
1 322-GY
202-BK
G460-GN
308-YL
N
(14) SOL 5
127-0574
A
NN
403-GN
200-BK
A429-YL
L65
J
CONN 37
(B) SERVICE
METER
3E-9359
J
J
101-RD
+ 200-BK
SIG
J
A429-YL
200-BK
752-YL
921-WH
1
2
(14) SOL 4
127-0574
BK-18
WH-18
L54
441-OR
614-PU
A
N
1
2
(14) SOL 3
127-0574
D
L54
608-GN
A429-YL
A476-PU
E458-YL
441-OR
C491-PU
1
8
6
4
3
9
7
5
2
308-YL
E458-YL
E458-YL
751-GN
921-WH
1
2
105-8827 DIODE AS.
E
MUR440
1
556-WH
200-BK
2
L46
L46
GN
GN
1
2
1
2
403-GN
(A) GAUGE
CLUSTER
127-8314
M
L25
N
(14) SOL 2
127-0574
556-WH
200-BK
2
1
E
(14) SOL 1
127-0574
E
CONN 3
NNN
NNN F
A 126-PK
A 308-YL
B 202-BK
B 202-BK
C G460-GN
C G460-GN
L55
498-WH
556-WH
308-YL
322-GY
114-RD
611-PU
619-GN
614-PU
200-BK
L55
200-BK
(17) DIFFERENTIAL
UNLOCK SOLENOID
7T-9073
135-BU
200-BK
614-PU
614-PU
614-PU
609-YL
614-PU
A429-YL
200-BK
403-GN
608-GN
441-OR
A476-PU
E458-YL
1
2
(32) 12V POWER
PORT
117-2311
L12
M
L16
F473-YL
200-BK
DOME LAMP
8C-9678
3
1 108-BU
2 200-BK
K
609-YL
135-BU
200-BK
WH
RD
BK
L12
INSTRUMENT PANEL
200-BK
611-PU
165-RD
165-RD
609-YL
308-YL
556-WH
(26) TRANSMISSION
OIL TEMP SENS
3E-8700
OR-18
V+
BK-18
GROUND
YL-18
SIGNAL
L21
L65
PP
1
OPERATOR STATION
L12
L65
E975-PU
200-BK
L65
200-BK
200-BK
135-BU
L69
L69
L21
L16
L18
L51
6
3
5
4
1
2
2
L76
L16
L12
L3
L50
GROUND
+ BATTERY
GROUND (RADIO)
+12V RADIO
+24V IN
+12V MEMORY
L69
200-BK
200-BK
556-WH
604-OR
614-PU
200-BK
DD HH
1 608-GN
2 200-BK
L16
L12
L65
921-WH
921-WH
921-WH
200-BK
L51
L50
CONN 5
608-GN
200-BK
L16
A
202-BK
202-BK
202-BK
CCC
604-OR
614-PU
200-BK
3
A
(8) 24 TO 12 VOLT
CONVERTER
119-1733
202-BK
306-GN
307-OR
308-YL
921-WH
321-BR
795-YL
E460-BR
M998-OR
E975-PU
1
3
2
RD
WH
BK
REAR FLOOD
LAMP
9X-6775
L51
2
6
4
1
9
3
7
8
10
5
S
T
G
2
3
4
5
1
6
7
E
202-BK
306-GN
307-OR
308-YL
921-WH
321-BR
795-YL
E460-BR
M998-OR
E975-PU
STOP/TAIL
LAMP
8C-6207
CCC
604-OR
614-PU
321-BR
921-WH
200-BK
L76
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
507-WH
506-PU
578-BU
CONN 4
614-PU
614-PU
614-PU
F
507-WH
200-BK
M
CCC
1 321-BR
2 921-WH
4
200-BK
619-GN
(8) FRONT UPPER A
(8) FRONT LOWER
A
WASHER
WASHER
MOTOR
MOTOR
+
+ 7T-8891
7T-8891 A A
(1) ALARM BACKUP
123-6449
BK
BK
5
A
(8) REAR A
MOTOR
WASHER
+
7T-8891
611-PU
7
619-GN
611-PU
8
L2
9
L2
10
611-PU
619-GN
11
200-BK
12
200-BK
13
200-BK
14
614-PU
200-BK
15
P
P
P
P
HI BEAM
HEADLAMP
9X-7170
LO BEAM
HEADLAMP
9X-7169
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAUGE
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
NOTE B: TERMINAL
3T-3157
SPRING
3T-3159
SOCKET
3T-3158
CONTACT
6D4161
BOOT
3T-3278
NOTE C:TRANSMISSION SHIFT LEVER LOGIC TABLE:
TO
24V OUTPUTS
GND
SOLENOIDS S B D W/ SOL NEU
GEAR 1 2 3 4 5 6 7 8 T U HP AWD RET
PARK
N
1F
2F
3F
4F
5F
6F
7F
8F
1R
2R
3R
4R
5R
6R
NOTE D: THE FOLLOWING WIRES MUST BE TWISTED
AT LEAST 1 TURN / 25 MILLIMETERS
710-GN & 202-BK: 892-BR & 893-GN
NOTE E: ONLY ONE FORWARD HORN SHOULD BE INSTALLED
NOTE F: WITH FRONT FLOOD LAMPS ONLY USE
SWITCH 123-5849
NOTE G: FRONT FLOOD LAMPS AND REAR FLOOD
LAMPS USE SWITCH 9X-9632
(16) BRAKE AIR SW
112-2404
A
A
(16) STOP
LAMP SW
2M-9346
2
B
1
THIS SCHEMATIC IS FOR THE 12H, 140H AND 160H MOTOR GRADER STANDARD
VERSION ELECTRICAL SYSTEM
MEDIA NUMBER: SENR9149-03
SCHEMATIC PART NUMBER: 145-5121, CHANGE: 01, VERSION: Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
in neutral and with parking brake set.
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
A
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
26
31
13
22
17
3
11
7
8
12
30
28
29
4
20
25
C
27
18
13
30
22
12
11
E
32
27
28
4
3
17
29
7
20
25
32
D
23
E
21
A
14
18
1
2
5
10
15
D
C
16
B
24
B
A
9
16
23
24
5
2
1
14
31
26
8
10
21
15
19
9
19
VIEW ALL CALLOUTS