12H, 140H, AND 160H MOTOR GRADERS (STANDARD VERSION) ELECTRICAL SYSTEM

©
1996 Caterpillar
All Rights Reserved
Printed in U.S.A.
SENR6987
February 1996
12H, 140H, And 160H
Electrical System
12H:
5ZM1-UP
4ER1-UP
140H:
5HM1-UP
8JM1-UP
160H:
2FM1-UP
9JM1-UP
Motor Graders (Standard Version)
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
Normally open switch that is closed due to an applied condition, and will open again with a
specific decrease in that condition.
Normally closed switch that will open with an increase of a specific condition.
Normally closed switch that is open due to an applied condition, and will close again
with a specific decrease in that condition.
The circle indicates that the component has screw terminals and a wire can be disconnected
from it.
No circle indicates that the wire cannot be disconnected from the component.
This indicates that the component has a wire connected to it that is connected to ground.
This indicates that the component does not have a wire connected to ground. It is grounded
by being fastened to the machine.
Electrical Schematic Symbols And Definitions
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
A AA
2
A AA
1
2
325-PK-14
C
A
325-PK-14
200-BK-14
T
FUSE - A component in an electrical circuit that will open the circuit if too much current flows
through it.
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.
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.
CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too
much current flows through it. This does not destroy the circuit breaker and it can be reset to
become part of the circuit again.
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.
Harness And Wire Electrical Schematic Symbols
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The
plugand receptacle contain
both pins and sockets.
Typical representation of a
Deutsch connector. The
plug contains all sockets
and the receptacle contains
all pins.
MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is
activated by electricity and held latch 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.
Failure Mode Identifiers (FMI)¹
FMI No.
Failure Description
0 Data valid but above normal operational range.
1 Data valid but below normal operational range.
2 Data erratic, intermittent, or incorrect.
3 Voltage above normal or shorted high.
4 Voltage below normal or shorted low.
5 Current below normal or open circuit.
6 Current above normal or grounded circuit.
7 Mechanical system not responding properly.
8 Abnormal frequency, pulse width, or period.
9 Abnormal update.
10 Abnormal rate of change.
11 Failure mode not identifiable.
12 Bad device or component.
13 Out of calibration.
Flash
Codes
CID - FMI Description
11
N/A No diagnostics active
12
N/A 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 groud
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
54 444 F05 Starter relay open circuit
55 444 F06 Starter relay short to ground
56 444 F03 Starter relay short to battery
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
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
Transmission Diagnostic Code Conversion
Connector Number
Schematic
Location
Machine
Location
CONN 1 F-3 2
CONN 2 C-5 6
CONN 3 C-5 6
CONN 4 F-6 3
CONN 5 A-6 6
CONN 6 C-6 4
CONN 7 E-6 3
CONN 8 E-6 3
CONN 9 B-7 11
CONN 10 B-7 9
CONN 11 A-8 11
CONN 12 B-9 4
CONN 13 E-9 2
CONN 14 D-10 2
CONN 15 A-11 2
CONN 16 E-12 4
CONN 17 E-12 4
CONN 18 E-12 4
CONN 19 D-12 2
CONN 20 B-12 7
CONN 21 F-14 10
CONN 22 E-15 5
CONN 23 D-15 5
CONN 24 B-13 8
CONN 25 B-13 8
¹The 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.
Connector Location¹
Component
Schematic
Location
Machine
Location
Component
Schematic
Machine
Location
Alarm - Axction B-18
C
Sender - Transmission Speed D-15
14
Alarm - Backup F-15
1
Solenoid - Centershift B-3
16
Alternator D-14
2
Solenoid - Differential Unlock E-14
17
Battery C-14
3
Solenoid - Dual Horsepower A-13
5
Battery 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 - Transmission A-7
E
Solenoid - Start Aid A-13
18
Control - Transmission Shifter A-8
C
Solenoid - Transmission Valves E-15
14
Fuses D-9
B
Switch - Beacon B-6
C
Fuses (10A) B-6
C
Switch - Blower (Heater Group) A-10
C
Gage - Cluster F-5
A
Switch - Brake Air Pressure A-2
16
Ground - Engine C-13
2
Switch - Centershift Indicator B-3
19
Ground - Front Frame C-12
21
Switch - Centershift Pin B-8
C
Horn - Forward F-3
16
Switch - Defrost, Front A-6
C
Meter - Service E-10
B
Switch - Defrost, Rear B-6
C
Motor - Blower E-4
E
Switch - Differential Unlock D-9
B
Motor - Blower (Heater Group) A-10
E
Switch - Disconnect C-14
13
Motor - Blower , Defroster A-11
E
Switch - Engine Coolant Temp. (Start Aid) A-14
11
Motor - Starter C-13
5
Switch - Flood Lamp D-8
B
Motor - Washer, Front Lower F-6
8
Switch - Forward Horn E-9
B
Motor - Washer, Front Upper F-6
8
Switch - Fuel Pressure B-13
13
Motor - Washer, Rear F-5
8
Switch - Head/ Tail Lamp E-8
B
Motor - Wiper, Front Lower C-4
9
Switch - Headlamp Dimmer E-9
B
Motor - Wiper, Front Lower D-4
D
Switch - Inching Pedal Pressure D-15
14
Motor - Wiper, Rear B-11
D
Switch - Key Start B-9
C
Relay - Start D-13
5
Switch - Park Brake Pressure B-11
16
Relay - Transmission Action Lamp C-10
8
Switch - Start Aid E-8
B
Resistor - Blower Speed B-11
E
Switch - Stop Lamp Pressure A-2
16
Resistor - Blower Speed E-4
E
Switch - Tail Lamp D-8
B
Resistor - Blower Speed (Heater Group) A-10
E
Switch - Wiper, Front Lower A-5
C
Sender - Articulation C-12
7
Switch - Wiper, Front Upper B-5
C
Sender - Engine Coolant Temperature B-14
11
Switch - Wiper, Rear A-5
C
Sender - Engine Oil Pressure B-13
13
Machine locations are reapeated for components located close together.
A = Operrator'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).
Component Location
Form Number
Alternator: (6N-9294):
Consist No. 3T-6352
SENR4978
Consist No. 7N-9720
SENR2082
Consist No. 9G-4574
SENR4130
SENR6982
Starting Motor: (106-8555)
Consist No. 6V-5207 SENR3581
Consist No. 6V-5023 SENR3536
Consist No. 6V-5226 SENR4975
Title
Electronic Transmission Shift Control
Related Electrical Service Manuals
Resistor, Sender and Solenoid Specifications
Component Description Part No. Resistance (Ohms)¹
Resistor - Power 7T-4003 10.0 ± 0.5
Resistor - Blower Speed 9G-1950
Overall 2.00 ± .10
Tap 1.00 ± .05
Solenoid - Centershift 8T-8808 34.3 ± 1.7
Solenoid - Dual Horsepower
8T-8610 13.5 ± 1.35
Solenoid - Differential Unlock 7T-9073 33.6 ± 1.0
Solenoid - Engine Shutdown 3E-7985
Start (Latch) 1.55 ± 0.15
Stop (Unlatch) 10.30 ± 1.03
Solenoid - Forward Horn 7T-9074 55.17 ± 5.77
Solenoid - Start Aid 9G-4365 6
Solenoid - Transmission 127-0574 31 ± 3
¹ At room temperature.
Part No. Function Actuate Deactuate Contact Position
2M-9346 Stop Lamp Pressure
45.0 kPa Max
(6.5 psi Max)
5.0 kPa MIN
(0.5 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
8N-1693 Engine Coolant Temp (Start Aid)
37.8 ± 2.8ºC
(100 ± 5ºF)
26.7ºC MIN
(80.0ºF MIN)
Normally Closed
3T-4418 Fuel Pressure
93.0 ± 20.8ºC
(13.5 ± 3.0 psi)
69 ± 21 kPa
(10 ± 3 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
Off Machine Switch Specification
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
7
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
7
D52056
Black callouts are for harness connectors.
See Connector Location Chart
White callouts are for components.
See Component Location chart
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
101 RD BAT (+) (NOT APPLICATION SPECIFIC) 505 BU WIPER - REAR (HI)
102 BU HD LMP 506 PU WASHER - FRONT
103 YL AUX CKT 507 WH WASHER - REAR
105 BR KEY SW 515 GY BLOWER MOTOR (HI)
108 BU AUX CKT 516 GN BLOWER MOTOR (MEDIUM)
109 OR AL T OUTPUT (+) TERM. 517 BU BLOWER MOTOR (LO)
113 OR OPR MON PANEL B+ SWITCHED 521 YL A/C SW TO REFRIGERANT SW
114 GN WARNING HORN (FORWARD) 556 WH DIFFERENTIAL LOCK
116 BR AUX CKT 575 YL WIPER - AUX (PARK)
118 GY AUX CKT 576 PK WIPER - AUX (LO)
119 PK AUX CKT 577 PU WIPER - AUX (HI)
124 GN A/C 578 BU WASHER - AUX
130 GN AUX CKT 584 YL WIPER SW JUMPER
141 PK AUX CKT A503 PK FRONT DEFROSTER FAN (LO)
144 GN AUX CKT A504 GN REAR DEFROSTER FAN (LO)
149 PU AUX CKT A506 OR FRONT DEFROSTER FAN (HI)
151 GN AUX CKT A507 YL REAR DEFROSTER FAN (HI)
152 BU AUX CKT
165 YL AUX CKT 601 GY DASH LAMP HI
603 PK ROTARY BEACON
200 BK MAIN CHASSIS 604 OR STOP LAMP
200 BK MAIN CHASSIS 608 GN FLOOD LAMP - REAR
202 BK XMSN CTRL 609 YL FLOOD LAMP - SIDE
276 BK XMSN CTRL IDENT CODE 0 611 PU HEAD LAMP HI
277 BK XMSN CTRL IDENT CODE 1 614 PU PARK/TAIL/DASH LAMP
278 BK XMSN CTRL IDENT CODE 2 619 GN HEAD LAMP LO
301 BU STARTER NO.1 SOL 710 GN XMSN SPEED PICKUP SIGNAL
304 WH STARTER RL Y NO.1 OUTPUT 751 GN XMSN SHIFT SOL NO.1 OR 3
306 GN STARTER RL Y COIL TO XMSN CTRL 752 YL XMSN SHIFT SOL NO. 2
307 OR KEY START SW TO XMSN CTRL 754 BU XMSN SHIFT SOL NO.3 OR 1
308 YL MAIN POWER RLY COIL 755 OR XMSN SHIFT SOL NO.4 OR 5
310 PU START AID SW TO START AID SOL 758 GN AWD CLUTCH SW
311 WH START AID SOL TO TEMP SW 795 YL DUAL HP SOL
321 BR BCKP ALARM LAMP TRAVEL ALARM B751 BU CENTERSHIFT LOCK SOL
322 GY WARNING HORN (FORWARD) 892 BR PORT/CAT DATA LINK (-)
326 PU KEY START SW "C" TERM. 893 GN PORT/CAT DATA LINK (+)
900 PU XMSN SHIFT SOL NO.5 OR 4
403 GN ALTERNATOR (R) TERM. 901 WH XMSN SHIFT SOL NO. 6
439 YL LAMP INDICATOR 902 BR XMSN SHIFT SOL NO. 7
441 OR ENG COOLANT TEMP GAGE 903 GY XMSN SHIFT SOL NO. 8
A429 YL ARTICULATION INDICATOR 921 WH XMSN SOL NO 1 OR 3 RETURN
A476 PU ENG OIL PRESS GAGE TO SENDER - ENG #1 E937 PU MG XMSN CNTL - REDUNDANT NEUT
B476 BU
TRANSMISSION LAMP RELAY TO INDICATOR
LAMP
E938 OR MG XMSN CNTL - FIRST GEAR
C491 PU PARK BRAKE PRESSURE E939 WH MG XMSN CNTL - SECOND GEAR
E458 YL LOW AIR PRESSURE LAMP E940 BU MG XMSN CNTL - THIRD GEAR
E459 WH LOW AIR PRESSURE ALARM E941 YL MG XMSN CNTL - FOURTH GEAR
E460 BR TRANS CNTL TO RELAY COIL E942 GN MG XMSN CNTL - FIFTH GEAR
E943 BR MG XMSN CNTL - SIXTH GEAR
500 BR WIPER - FRONT (PARK) E944 GY MG XMSN CNTL - SEVENTH GEAR
501 GN, WIPER - FRONT(LO) E945 PU MG XMSN CNTL - EIGHTH GEAR
502 OR WIPER - FRONT (HI) E946 OR MG XMSN CNTL - FORWARD DIRECT
503 BR WIPER - REAR (PARK) E947 WH MG XMSN CNTL - REVERSE DIRECT
504 YL
WIPER - REAR (LO)
E948 BU MG XMSN CNTL - PARK
E949 YL MG XMSN CNTL - NEUTRAL
E975 PU XMSN LAMP
Wire Description Chart
Lighting Circuits
Control Circuits
Ground Circuits
Basic Machine Circuits
Accessory Circuits
Accessory Circuits (Continued)
Power Circuits
Monitoring Circuits
¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed
condition can be maintained down to 170 kpa (25psi).
² Contact postion at the contacts of the harness connector.
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
611-PU
619-GN
114-GN
322-GY
DEFROSTER
9X-9657
609-YL
BLOWER
9X-0343
RD
BK
A506-OR
200-BK
L76 L76
200-BK
L21
L16
L12
200-BK
200-BK
1
2
K
L21
200-BK
200-BK
200-BK
200-BK
507-WH
506-PU
578-BU
507-WH
200-BK
IGN
SEND
GRD
ARTICULATION
- +
-+
REAR
WASHER
7T-8891FRONT UPPER
WASHER
7T-8891
MOTOR
MOTOR
2
5
7
9
3
4
6
8
1
COOLANT
TEMP
113-OR
441-OR
614-PU
GAUGE
CLUSTER
127-8314
WH
RD
OR
PU
GN
GY
PK
YL
BK
(12 V)
(24 V)
(12 V)
(24 V)
IGN
IGN
SEND
GRD
AA
AA
IGN
INSTRUMENT PANEL
A429-YL
A476-PU
113-OR
200-BK
L16
L12
- +
FRONT LOWER
WASHER
7T-8891
MOTOR
AA
L65
L65
L12
L16
J
614-PU
START AID SW
7
6
5
4
3
2
1
A429-YL
609-YL
614-PU 614-PU
611-PU
619-GN
609-YL
614-PU
556-WH
308-YL
322-GY
114-GN
611-PU
619-GN
614-PU
L37
L12
L12
556-WH
308-YL
J
A
J
614-PU
CONN 13
L65
L16
NN
8
7
6
5
4
3
2
1
C491-PU
608-GN
A476-PU
E458-YL
441-OR
441-OR
E458-YL
608-GN
A476-PU
L16
L16
L16
200-BK
A429-YL
403-GN
L65
108-BU
200-BK
L65
DOME LAMP
8C-9678
3
2
1
BK
RD
WH
K
C
A
CONN 16
200-BK
200-BK
L55
L55
403-GN
2
1
200-BK
608-GN
608-GN
200-BK
REAR FLOOD
LAMP
9X-6775
L69
L69
DIFFERENTIAL
UNLOCK SOLENOID
7T-9073
HHDD
4
3
2
1
604-OR
614-PU
321-BR
200-BK
200-BK
200-BK
L69
L51 L51
L51
200-BK
556-WH
E
D
CONN 21
G
S
T
604-OR
614-PU
321-BR
200-BK
200-BK
604-OR
614-PU
200-BK
RD
WH
BK
1
3
2
D
321-BR
200-BK
614-PU
604-OR
608-GN
BACKUP
ALARM
3T-1815
STOP/TAIL
LAMP
8C-6207
D
200-BK
D
921-WH
752-YL
921-WH
751-GN
1
2
SOL 2
SOL 1
2
1
127-0574
127-0574
L50
L50
N
N
L46
TRANS SPD SENDER
104-6387
710-GN
202-BK
8
7
6
9
5
4
3
2
10
1
903-GY
902-BR
901-WH
921-WH
900-PU
755-OR
754-BU
752-YL
921-WH
751-GN
921-WH
903-GY
921-WH
902-BR
921-WH
901-WH
921-WH
900-PU
921-WH
755-OR
921-WH
754-BU
1
2
2
1
SOL 4
SOL 8
SOL 7
SOL 3
1
2
2
1
2
1
SOL 6
SOL 5
1
2
127-0574
127-0574
127-0574
127-0574
127-0574
127-0574
202-BK
758-GN
L46
BK-18
WH-18
V F
1
2
202-BK
710-GN
1
2
V
F
N
N
N
N
N
N
710-GN AND
202-BK ARE
TWISTED PAIR
NOTE D
N
CONN 22
CONN 23
INCHING PEDAL
BK
BK
F
758-GN
202-BK
2
1
PRESSURE SW
(TRANSMISSION)
111-7088
L51
L69
L51
COOLANT TEMP
SENDER
7N-8532
2
1
G
1
3
2
200-BK
614-PU
604-OR
STOP/TAIL
LAMP
8C-6207
RD
WH
BK
604-OR
614-PU
200-BK
608-GN
200-BK
REAR FLOOD
LAMP
9X-6775
T
S
L50
L50
HHDD
200-BK
608-GN
200-BK
200-BK
608-GN
311-WH
310-PU
1
2
COOLANT SW
8N-1693
T
441-OR
311-WH
B
B
L63
L63
Y
YHH
SENDER
116-9937
200-BK
795-YL
BK-18
BK-18
START AID
SOLENOID
9G-4365
1
200-BK
200-BK
L52
2
DUAL HORSEPOWER
SOLENOID
8T-8610
NOTE E
B
1
2
200-BK
603-PK
BEACON
9X-9556
BULB
9X-7849
H
PARK BRAKE
SOLENOID
7T-9074
A507-YL
200-BK
RD
BK
200-BK
504-YL
119-PK
503-BR
505-BU
603-PK
A504-GN
A507-YL
BLOWER
9X-0343
DEFROSTER
9X-9657
MOTOR
L41
L41
L20
L20
1
2
RESISTOR
7T-4003
200-BK
200-BK
H
H
H
2
4
1
5
3
614-PU
200-BK
124-GN
X
BLOWER
9X-9363
515-GY
200-BK
124-GN
521-YL
515-GY
516-GN
517-BU
BLOWER SW
6P-3236
RESISTOR
9G-1950
BASE
7G-9730
PANEL LAMP
8D-1429
WH/RD-14
BK-14
2
1
MOTOR
3
4
5
2
1
HEATER GP 8C-9787
X
L42
U
200-BK
601-GY
CONN 15
ST
ON
OFF
B
S
C
U
U
U
TRANSMISSION DIRECTION
AND SPEED SW.
8C-5337
L20
L42
308-YL
326-PU
307-OR
105-BR
R
CENTERSHIFT
PIN SW
9X-9634
200-BK
U
U
U
U
614-PU
165-YL
B751-BU
3
2
B751-BU
4
3
278-BK
SHIFT CONSOLE
202-BK
276-BK
277-BK
G
RED NEUT
202-BK
202-BK
202-BK
202-BK
14
13
12
11
10
9
8
7
6
5
4
3
202-BK
2
1
15
16
17
18
19
20
21
22
23
24UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
FIRST
GROUND
EIGHTH
SECOND
THIRD
FOURTH
FIFTH
SIXTH
SEVENTH
E943-BR
FORWARD
REVERSE
PARK
NEUTRAL
E937-PU
202-BK
E938-OR
E939-WH
E940-BU
E941-YL
E942-GN
E944-GY
E945-PU
E946-OR
E947-WH
E948-BU
E949-YL
202-BK
202-BK 202-BK
2
1
L44
G
202-BK
202-BK
G
202-BK
202-BK
202-BK
CONN 11
278-BK
921-WH
903-GY
902-BR
901-WH
900-PU
755-OR
754-BU
752-YL
751-GN
DIA CODE 2
DIA CODE 1
20 INCH PEDAL
TRANSMISSION CONTROL
106-4458
758-GN
E975-PU
277-BK
276-BK
E949-YL
E948-BU
E947-WH
E946-OR
DIA CODE 0
+BATTERY
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
18
17
16
15
14
13
12
11
10
8
5
4
3
1
2
7
E945-PU
E944-GY
L44
795-YL
E943-BR
321-BR
E942-GN
306-GN
E941-YL
307-OR
E940-BU
308-YL
E939-WH
202-BK
E938-OR
REVERSE
FORWARD
G
EIGHTH
SEVENTH
SIXTH
FIFTH
FOURTH
THIRD
SECOND
FIRST
RED NEUTR
CAT LINK +
(N) NEUT
BUFF TOS
UNUSED
GROUND
NEUTRAL
9W-1951
TOS + INP9
E937-PU
893-GN
892-BR
710-GN
19 A/M LAMP
SOLE RETN
SOLENOID 8
SOLENOID 7
SOLENOID 6
SOLENOID 5
SOLENOID 4
E460-BR
SOLENOID 3
SOLENOID 2
SOLENOID 1
EMS OUT
DUAL HP 6
CAT LINK -
BU ALARM
START REL.
START SW.
L
L
L
L
L
L
L
L
L
FRONT
DEFROST SW
9X-9638
584-YL
584-YL
L5
L20
L20
L18
4
8
1
6
3
5
7
2
200-BK
A503-PK
A506-OR
584-YL
2
151-GN
5
1
584-YL
3
4
A504-GN
6
A507-YL
200-BK
141-PK200-BK
A507-YL
A504-GN
603-PK
119-PK
505-BU
503-BR
504-YL
6
4
3
200-BK
614-PU
200-BK
1
5
2
LH
CONN 5
119-PK
119-PK
119-PK
119-PK
L
L
L
L
L
L
L
L
L L
578-BU
577-PU
576-PK
575-YL
505-BU
504-YL
152-BU
152-BU
119-PK
119-PK
H
L
B B
P
W
503-BR
W
P
B
507-WH
FRONT LOWER
WIPER SW
3T-6655
B
L
H
REAR
WIPER SW
3T-6655
L18
BRAKE AIR SW
112-2404
BK-18 1
2
BRAKE AIR SW
112-2404
BK-18
BK-18 2
L5
1 BK-18
A
A
A
A
A
GN
GN
CENTERSHIFT
SOLENOID
8T-8808
1
2
B751-BU
200-BK
GN
GN
114-GN
322-GY
1
2
A
FORWARD
HORN
SOLENOID
7T-9074
NOTE H
STOP LAMP
SW
2M-9346
130-GN
604-OR
E458-YL
200-BK
E458-YL
200-BK
200-BK
200-BK
P
P
L1L1
P
P
NOTE H: ONLY ONE FORWARD HORN SHOULD BE INSTALLED
NOTE E: STD 140H AND 160H ONLY
NOTE D: THE FOLLOWING WIRES MUST BE TWISTED
AT LEAST 1 TURN / 25 MILLIMETERS
710-GN & 202-BK: 892-BR & 893-GN
611-PU
619-GN
NOTE G: FRONT FLOOD LAMPS AND REAR FLOOD
LAMPS USE SWITCH 9X-9632
NOTE F: WITH FRONT FLOOD LAMPS ONLY USE
SWITCH 123-5849
619-GN
200-BK
611-PU
200-BK
LO BEAM
HEADLAMP
9X-7169
HI BEAM
HEADLAMP
9X-7170
D49074
6R
5R
4R
3R
2R
1R
8F
7F
6F
5F
4F
3F
2F
1F
N
PARK
GEAR
TO
GND
24V OUTPUTS
NEU
SOL
RET8
W/
AWD76
SOLENOIDS D
HP5
B
U43
S
T21
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
THIS IS THE SCHEMATIC FOR THE 12H AND
140H AND 160H STANDARD SERIES MOTOR GRADER FROM
FIRST PRODUCTION AND UP
UNLESS OTHERWISE SPECIFIED: ALL WIRES IN A SPLICE
ARE THE SAME IDENT. NUMBER, COLOR, AND 16 GAGE
AND XMSN SHIFTER IN NEUTRAL
TRANSMISSION SHIFT LEVER LOGIC TABLE:
NOTE B: TERMINAL 3T-3157
SPRING 3T-3159
SOCKET 3T-3158
CONTACT 6D4161
BOOT 3T-3278
NOTE C:
PP 115-4599 02 (EEC SOCKET) 231 ATCH
V 104-8588 01 (TRANS SPEED SENDER) 271
X 124-1429 00 (HEATER GP) 154 ATCH
Y 126-8197 00 (FUEL TANK) 230
Z 8W-1987 02 (FORWARD HORN) 121
QQ 111-0871 00 (POS BAT TO START MTR) 210
RR 110-6398 00 (NEG BAT/DISCONNECT SW) 211
SS 110-6399 01 (DISCONNECT SW TO GND) 212
TT 3W-3620 00 (NEG BAT TO POS BAT) 213
UU 061-7661 03 (START MTR TO FRAME GND) 214
VV 7G-1060 00 (GND-R FRAME TO F FRAME) 204
ZZ 1S-2342 02 (GND-F FRAME TO CAB) 105
AA 101-8197 01 (HEADLAMP BREAKER) 141 ATCH
BB 101-8196 01 (LOW BEAM BREAKER-BAR) 142 ATCH
CC 101-8190 02 (BLADE FLOOD LAMP) 106 ATCH
DD 101-8192 01 (REAR FLOOD LAMP) 205 ATCH
HH 101-8193 03 (REAR FLOOD LMP-FUEL TNK) 206 ATCH
NOTECHG
CABLE AS.
LOC
WIRE AS.
HARNESS AS.
PART NO.IDENT
L 127-1029 00 (SW PANEL) 180 ATCH
M 126-4027 00 (GAGE CONSOLE) 160
N 9U-9313 01 (TRANSMISSION) 270
P 127-1036 00 (HEADLIGHTS-BAR) 100 ATCH
S 127-1030 00 (CAB FUSE PANEL) 183 ATCH
U 126-9166 00 (XSMN CONSOLE-SWITCHES 171
A 127-0879 00 (PLATFORM) 120
B 126-8541 00 (ENGINE) 220
C 126-7912 00 (R FRAME-ENGINE) 200
D 126-7238 00 (RADIATOR GRILL) 203
E 126-7570 00 (R FRAME) 201
F 101-8168 01 (R FRAME-TRANS) 202
G 126-9172 00 (XSMN CONSOLE) 170
H 101-8161 02 (CAB-REAR) 182 ATCH
J 126-9204 00 (STEERING CONSOLE) 140
K 127-0908 00 (CAB-FRONT) 181 ATCH
LEVEL
LL 9F-4337 07 (START MTR TO ENGINE) 221
NN 116-2145 00 (HORN SWITCH) 143
CIRCUIT GROUPING
DESIGNATION
L#
ATCH WIRE, CABLE &
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
BLUE
GREEN
BU
GN
RD
WH
OR
YL
PK
BK
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
ELECTRICAL CONNECTION
TO MACHINE STRUCTURE
CONNECTOR
SYMBOL DESCRIPTION
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
PU
GY
200-BK
611-PU
611-PU
L1
L1
200-BK
619-GN
611-PU
HI BEAM
HEADLAMP
9X-7170
200-BK
200-BK
200-BK
619-GN
619-GN
P
P
P
P
619-GN
200-BK
200-BK
611-PU
LO BEAM
HEADLAMP
9X-7169
FORWARD
HORN
7T0969
NOTE H
Z
Z
P
A
A
114-GN
322-GY
611-PU
619-GN
200-BK
Z
1
2
1
2
3
4
5
CONN 1
L62
A506-OR
A503-PK
RESISTOR
7T-4003
MOTOR
OPERATOR STATION
K
609-YL 609-YL
609-YL
K
CC
A
1
2
200-BK
609-YL
200-BK
BLADE
FLOOD
LAMP
9X-6775
L16
108-BU
200-BK
A506-OR
200-BK
M
M
439-YL
200-BK
614-PU
200-BK
C'SHIFT PIN
INDICATOR
LAMP
7N-5876
NOTE B
R/S SYSTEM
AIR PRESS
GAUGE
1W-3306
LAMP
7N-5876
NOTE B
M
M
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
LAMP
8M-6176
VOLTMETER
M
SEND
GRD
M
308-YL
E458-YL
ENGINE OIL
PRESSURE
200-BK
200-BK
M
AIR
PRESSURE
LAMP
7N-5876
NOTE B
M
PARKING
BRAKE
7N-5876
NOTE B
C491-PU
200-BK
614-PU
200-BK
GRD
L/S SYSTEM
AIR PRESS
GAUGE
1W-3306
LAMP
7N-5876
NOTE B
M
SEND
M
5
1
4
3
4
8
7
1
3
2
6
E975-PU
2
5
M
M
A
A
E458-YL
439-YL
308-YL
B476-BU
B476-BU
M
200-BK
TRANS
ACTION
LAMP
7N-5876
NOTE B
C491-PU
614-PU
A476-PU
200-BK
A429-YL
441-OR
113-OR
TRANS
LAMP
7N-5876
NOTE B
200-BK
M
M
E975-PU
CONN 8
CONN 7
A429-YL
614-PU
439-YL
113-OR
200-BK
L65
L65
441-OR
C491-PU
A476-PU
E458-YL
E975-PU
L28
308-YL
B476-BU
J
J
J
J
J
J
J
J
J
200-BK
200-BK
614-PU
614-PU
200-BK
200-BK
200-BK
308-YL
310-PU
103-YL
6
4
3
1
5
2
HEADLAMP/
TAIL SW
3E-9317
102-BU
2
3
200-BK
614-PU
614-PU
619-GN
614-PU
123-6375
614-PU
614-PU
614-PU
614-PU
200-BK
J
J
103-YL
200-BK
614-PU
619-GN
322-GY
619-GN
HEADLAMP DIMMER SW
103-5678
HORN SW
116-2145
200-BK
J
J
2
1
2
1
B
SERVICE
METER
3E-9359
200-BK101-RD + -
JJ
611-PU
J
SIG
403-GN
2
4
6
7
9
5
8
1
3
2
1
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
609-YL
614-PU
614-PU
200-BK
200-BK
200-BK
165-YL
3
2
10
321-BR
604-OR
E459-WH
326-PU
795-YL
306-GN
113-OR
113-OR
439-YL
124-GN
113-OR
105-BR
200-BK
310-PU
2
5
1
3
4
6
L63
L44
116-BR
614-PU
200-BK
L37
609-YL
1
102-BU
101-RD
556-WH
L44
L63
L37
L44
L63
L38
L7
L36
L7
L7
L36
L36
L36
L38
L38
130-GN
L26
105-BR
124-GN
113-OR
165-YL 608-GN
116-BR
114-GN
149-PU
103-YL
L28
STOP LAMPS
308-YL
KEY SW
HEATER
GAGES
556-WH
DIFF LOCK
HORN
REAR FLOODS
BLADE FLOODS
L43
L43
L43
101-RD-10
HEADLAMP
BREAKER
3T-2662
10A
15A
L43
L44
149-PU
614-PU
FLOOD
LAMP SW
9X-9632
NOTE G
200-BK
FUSE BLOCK
9G-0747
200-BK
10A
15A
10A
10A
10A
10A
10A
10A
200-BK
200-BK
200-BK
DIFFERENTIAL
UNLOCK SW
123-5862
J
J
2
3
TAIL
LAMP SW
3E9319
200-BR
614-PU
614-PU
103-YL
J
J
A
A
J
AA
308-YL
L43
BLADE
FLOOD
LAMP SW
123-5849
NOTE F
3
2
403-GN
609-YL
608-GN
165-YL
130-GN
3K8782 FUSE (10A)
8M8948 FUSE (15A)
STEERING CONSOLE
101-RD
2
1
3
8
5
PK
GY
BU
WH
RD
TRANSMISSION ACTION
LAMP RELAY
106-9188
308-YL
B476-BU
A
101-RD-4
101-RD-10
113-OR
E460-BR
614-PU
101-RD-10
TAIL LAMPS
L71
113-OR
439-YL
CONN 14
L69
101-RD-4
E458-YL
FUEL
SW
3T-4418
109-OR-10
T
326-PU
200-BK-10
301-BU-10
306-GN
RD-00
BK-00
304-WH-10
101-RD-4
200-BK-4
ALTERNATOR
BREAKER
2H-1507 STD
9S-0174 ATCH
BK-6
403-GN
REAR
FRAME
STARTER
106-8555
109-OR-4
301-BU-10
304-WH-10
GND
START
STOP
DISCONNECT SW
7N-0718
101-RD-4
ALTERNATOR
6N-9294 35A STD
100-5047 50A ATCH
START
RELAY
3E-7279
40A
109-OR-4
RD-00
BK-00
ENGINE
200-BK-4
BK-00
BK-00
12V BATTERY
3T-5760
G S
MTR BAT
MOTOR
ALT
+
R
NEGPOS
NEG POS
1
2
3
2
1
2
1
3
4
4
L71
L71
L71 L71
L71
9
8
7
6
5
4
3
5
2
1
5
2
G
L46
K
K
L
S
S
S
S
S
S
B
B
B
B
B
B
B
B
B
B
B
B
B
8
5
200-BK
200-BK
200-BK
101-RD-4
614-PU
614-PU
Y
E460-BR
Y
Y
Y
200-BK
2
3
4
1
5
C
C
E459-WH
A476-PU
441-OR
311-WH
200-BK
608-GN
403-GN
311-WH
310-PU
E458-YL
Y
101-RD-4
C
1
C491-PU
200-BK
308-YL
PARK BRAKE
PRESS SW
112-2404
GN
GN
BK-18
200-BK
BK-18
5
4
3
L
L
L
L
L
L
L
L
L
L
L
L
L
506-PU
REAR
DEFROST SW
9X-9638
152-BU
200-BK
L
W
P
BB
L
H
7
6
4
118-GY
2
1
3
506-PU
578-BU
507-WH
575-YL
577-PU
576-PK
152-BU
L71
101-RD-10
614-PU
6
308-YL
200-BK
326-PU
L
307-OR
614-PU
105-BR
5
3
2
308-YL
307-OR
321-BR
202-BK
4
7
L
200-BK
614-PU
2
144-GN
603-PK
3
118-GY
200-BK
200-BK
ACTION ALARM
9G-9813
B751-BU
165-YL
RD
BK
306-GN
795-YL
1
118-GY
118-GY
321-BR
202-BK
308-YL
5
200-BK
200-BK
200-BK
200-BK
892-BR
6
L68
4
L67
L67
L67
L56
L56
L56 L56
L55
L55
3
L54 L54
L54 L54
L44
2
7
6
124-GN
893-GN
1
J
614-PU
U U
L38
614-PU
200-BK
PANEL LAMP
(SHIFT LEVER)
7N-5876
NOTE B
200-BK
200-BK
A429-YL
200-BK
ART
SENDER
3E-5383
A
A429-YL
200-BK
900-PU
1
2
308-YL
E459-WH
795-YL
306-GN
101-RD-4
SHUTDOWN
SOL
3E-7985
326-PU
310-PU
3
202-BK
710-GN
903-GY
4
1
2
902-BR
H
755-OR
754-BU
E975-PU
G
921-WH
752-YL
901-WH
Y
751-GN
200-BK-10
Y
1
10
604-OR
556-WH
614-PU
439-YL
KEY START SW
9G-7641
200-BK
321-BR
604-OR
504-YL
119-PK
503-BR
505-BU
GND
PARK
B+
GN
GY
BR
OR
4
2
3
1
HI
113-OR
2
LO
MOTOR
T
BK
A
L67
L52
L54
L54
L55
L55
L56
L56
L51
L38
L7
L37
L37
L37
L36
L36
L37
L36
L41
L41
L26
L76 L76
L76L76
200-BK-8
4K-5122 HOLDER AS.
3K-8782 FUSE
614-PU
200-BK
L26
L28
REAR
FRAME
L42
5
L19
1
2
4
758-GN
3
REAR WIPER
9X-3392
4
L21L21
L62
L63
L63
L19
L19L62
L5
L21
L21
L21
L18
L18
L18
L7
L7
L7
L7 L7
L7
L62
L62 L62
7
L7
2
3
6
4
F
5
1
2
1
1
9
5
3
4
2
6
8
7
10
200-BK
A
200-BK
C
118-GY
152-BU
119-PK
141-PK
151-GN
108-BU
144-GN
12V BATTERY
3T-5760
200-BK
200-BK
200-BK
200-BK
200-BK
556-WH
200-BK
200-BK
FRONT
FRAME
200-BK
200-BK-6
202-BK
200-BK
604-OR
130-GN
200-BK-8
101-RD-10
507-WH
578-BU
506-PU
152-BU
576-PK
577-PU
575-YL
GND
PARK
B+
614-PU
101-RD
507-WH
578-BU
506-PU
118-GY
501-GN
500-BR
502-OR
200-BK
200-BK
101-RD
FRONT UPPER
WIPER SW
3T-6655
BEACON SW
9X-9639
101-RD
152-BU
SOCKET AS.
9R-7941
200-BK
200-BK
200-BK
200-BK
200-BK
4
CAB
GROUND
FRONT LOWER
WIPER
9X-3392
576-PK
152-BU
575-YL
577-PU
501-GN
118-GY
500-BR
502-OR
108-BU
A503-PK
A506-OR
152-BU
576-PK
575-YL
577-PU
GN
GY
BR
OR
4
2
3
1
HI
LO
MOTOR
202-BK
T
BK
200-BK
GND
PARK
B+
GN
GY
BR
OR
4
2
3
1
HI
LO
MOTOR
T
BK
FRONT
FRAME
UPPER WIPER/WASHER
LOWER WIPER/WASHER
REAR WIPER/WASHER
FRONT DEFROSTER
REAR DEFROSTER
DOME LAMP
BEACON
10A
10A
10A
10A
10A
10A
10A
502-OR
WH-18
101-RD
101-RD
101-RD
101-RD
101-RD
101-RD
L
501-GN
FRONT UPPER
WIPER
9X-3392
500-BR
200-BK-6
PP
PP
200-BK
200-BK
614-PU614-PU
614-PU
G
PARK
101-RD
SERVICE
TOOL
CONNECTOR
M
B
A
E
200-BK 200-BK
D
PP
A
A
K
K
CCA
A
ZZZZ
L
L
KK
A
K
U
U
GN
GN
A
1
2
105-8827 DIODE AS.
A
C
H
H
VV
VV
A
AE
A
C
101-RD-4
QQ
LL
UU
UU
C
AC
Y
Y
Y Y
200-BK
200-BK
E458-YL
8
2
Y
308-YL
PP
200-BK
E459-WH
L53
7
200-BK
6
795-YL
D
SS
SSRR
QQ
RRTT
TT
E459-WH
G
F
GF
1
2
326-PU
B
1
2
101-RD
200-BK
611-PU
200-BK
6
4
7
BK
BR
PU
308-YL
306-GN
L53
60A
1
M
200-BK
200-BK
BK
LAMP
E459-WH
614-PU
B
892-BR & 893-GN
ARE TWISTED PAIR
NOTE D
CENTERSHIFT
INDICATOR SW
3E-9367
310-PU
311-WH
A476-PU
101-RD-10
ENGINE OIL
PRESSURE
L63
6
BK
FRONT FRAMEREAR FRAME
710-GN AND 202-BK
ARE TWISTED PAIR
NOTE D
609-YL
200-BK
OPERATOR STATION
WH-18
1
2
619-GN
CAB SWITCH AND FUSE PANEL
556-WH
CONN 6
CONN 10
CONN 9
CONN 2
CONN 3
CONN 12
CONN 17
CONN 18
CONN 19
CONN 24
CONN 25
CONN 20
3
2
4
1
WH-18
WH-18
BLADE
FLOOD
LAMP
9X-6775
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
CMS CIRCUIT.
PANEL LAMP CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CONTROL CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
8 7
6
5 4
3
A
1112131415 910
1
2
1
F
E
D
C
B
A
3 2
9 8 7
6
5 415 14 13 12 11 10
B
F
E
D
C