Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Action B-8 C Sender - Transmission Speed C-15 14
Alarm - Backup F-15 1 Solenoid - Centershift B-3 16
Alternator (35A STD) D-14 2 Solenoid - Differential Unlock E-14 17
Battery C-14 3,4 Solenoid - Dual Horsepower A-13 5
Breaker - Alternator (35A) D-13 5 Solenoid - Engine Shutdown D-13 5
Breaker - Headlamp (15A) D-10 B Solenoid - Forward Horn A-3 16
Control - Neutral Start A-6 10 Solenoid - Park Brake B-12 16
Control - Transmission A-7 E Solenoid - Start Aid A-13 18
Fuses B-6 C Solenoids - Transmission Valve (8) D-15,E-15 14
Fuses D-9 B Switch - Beacon B-16 C
Gauge Cluster F-5 A Switch - Blower (Heater) A-10 C
Ground - Engine C-13 12 Switch - Brake Air Pressure A-2 16
Ground - Front Frame D-6 21 Switch - Centershift Indicator B-3 19
Ground - Rear Frame C-13 28 Switch - Centershift Pin B-8 C
Ground Strap - Cab to Front Frame D-6 24 Switch - Defroster (Front) A-6 C
Ground Strap - Front Frame to Rear Frame C-12 20 Switch - Defroster (Rear) B-6 C
Horn - Forward E-3 16 Switch - Differential Unlock D-8 B
Meter - Service E-10 B Switch - Disconnect C-14 13
Motor - Blower (Heater group) A-10 E Switch - Engine Coolant Temp (Start Aid) A-14 11
Motor - Blower/Defroster A-11 E Switch - Flood Lamp D-8 B
Motor - Blower/Defroster E-4 E Switch - Forward Horn E-9 B
Motor - Starter C-13 S Switch - Fuel Pressure B-13 13
Motor - Washer (Front Lower) F-6 8 Switch - Head/Tail Lamp E-8 B
Motor - Washer (Front Upper) F-6 8 Switch - Headlamp Dimmer E-9 B
Motor - Washer (Rear) F-6 8 Switch - Inching Pedal Pressure D-15 14
Motor - Wiper (Front Lower) C-4 9 Switch - Key Start B-9 C
Motor - Wiper (Front Upper) D-4 D Switch - Park Brake Pressure B-11 16
Motor - Wiper (Rear) B-11 D Switch - Start Aid E-8 B
Relay - Start D-13 5 Switch - Stoplamp Pressure A-2 16
Relay - Transmission Action Lamp C-10 8 Switch - Tail Lamp D-8 B
Resistor - Blower Speed A-12 E Switch - Transmission Direction & Speed A-8 C
Resistor - Blower Speed E-4 E Switch - Transmission Oil Temperature D-15 26
Resistor - Blower Speed (Heater) A-10 E Switch - Wiper (Front Lower) A-5 C
Sender - Articulation C-1 2 7 Switch - Wiper (Front Upper) B-5 C
Sender - Engine Coolant Temp A-14 11 Switch - Wiper (Rear) A-5 C
Sender - Engine Oil Pressure B-14 13
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= Operators compartment (Under seat).
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
22
23
24
25
26
27
28
29
30
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
22
23
24
25
26
27
28
29
30
7
Machine Harness Connector And Component Locations
E20367
Related Electrical Service Manuals
Form Number
Alternator (6N-9294 35A): STD
Consist No. 3T-6352
Consist No. 7N-9720
Consist No. 9G-4574
SENR4978
SENR2082
SENR4130
Alternator (100-5047 50A): ATT SENR2082
Transmission Electronic Shift Control SENR6982
Starting Motor: (106-8558)
Consist No. 106-8557
Consist No. 106-8559
SENR3559
SENR3581
Title
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 C-15 26
CONN 2 E-15 26
CONN 3 F-14 6
CONN 4 A-14 5
CONN 5 B-13 29
CONN 6 B-13 29
CONN 7 D-13 30
CONN 8 D-13 29
CONN 9 E-12 21
CONN 10 E-12 25
CONN 11 E-12 25
CONN 12 E-12 25
CONN 13 D-12 21
CONN 14 D-12 21
CONN 15 B-12 25
CONN 16 D-10 23
CONN 17 C-10 23
CONN 18 A-11 C
CONN 19 B-9 25
CONN 20 E-9 B
CONN 21 A-8 C
CONN 22 B-7 25
CONN 23 Service Tool B-7 C
CONN 24 E-6 24
CONN 25 E-6 24
CONN 26 C-6 24
CONN 27 C-6 27
CONN 28 A-6 27
CONN 29 C-5 27
CONN 30 C-5 27
CONN 31 B-3 15
CONN 32 E-3 23
CONN 33 F-3 23
CONN 34 F-3 23
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.
Code
Flashed
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 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
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
63 269 F00 Sensor supply voltage above normal
64 269 F0l Sensor supply voltage below normal
65 701 F02 Transmission output speed signal incorrect
68 168 F0l 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 short to ground
75 764 F03 Transmission indicator lamp short to battery
77 762 F04
Transmission oil temperture switch
short to ground
Transmission Diagnostic Code Conversion
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits (Continued)
101 RD Bat (+) 506 PU Washer - Front
102 BU Hd Lmp 507 WH Washer - Rear
103 YL Aux Ckt 515 GY Blower Motor (HI)
105 BR Key Start Sw 516 GN Blower Motor (Medium)
108 BU Aux Ckt 517 BU Blower Motor (Low)
109 OR Alt Output (+) Term. 521 YL A/C SW To Refrigerant SW
113 OR Opr Mon Panel 522 WH A/C Clutch To Thermostat 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 (Low)
119 PK Aux Ckt 577 PU Wiper - Aux (Hl)
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 (Low)
144 GN Aux Ckt A504 GN Rear Defroster Fan (Low)
149 PU Aux Ckt A506 OR Front Defroster Fan (HI)
151 GN Aux Ckt A507 YL Rear Defroster Fan (HI)
152 BU Aux Ckt
Lighting Circuits
165 YL Aux Ckt 603 PK Rotary Beacon
Ground Circuits
604 OR Stop Lamp
200 BK Main Chassis 608 GN Flood Lamp - Rear
201 BK XMSN CtrI 609 YL Flood Lamp - Side
277 BK XMSN Ctrl Ident Code 1 611 PU Head Lamp Hi
278 BK XMSN CtrI Ident Code 2 614 PU Park/Tail/Dash/Lamp
Basic Machine Circuits
619 GN Head Lamp LoControl Circuits
301 BU Starter No. 1 Sol
Control Circuits
304 WH Starter Relay No. 1 OutpuT 710 GN XMSN Speed Pickup Signal
306 GN
Starter Relay Coil To Neut Start SW Or
KeyStart SW
751 GN XMSN Shift Sol No. 1 Or 3
307 OR Key Start SW To Neutral Start SW 752 YL XMSN Shift Sol No. 2
308 YL Main Power Relay Coil 754 BU XMSN Shift Sol No. 3 Or 1
310 PU Start Aid SW To Start Aid Sol 755 OR XMSN Shift Sol No. 4 Or 5
311 WH Start Aid Sol To Temp SW 758 GN AWD Clutch SW
321 BR Backup Alarm Lamp Travel Alarm 795 YL Dual Hp Sol
322 GY Warning Horn (Forward) B751 BU (NFND) Centershift Lock Sol
326 PU Key Start SW C Term. 892 BR Start Mod Right (-) Port/CAT Data Link (-)
Monitoring Circuits
893 GN Start Mod Right (+) Port/CAT Data Link (+)
404 GN Alternator (R) Term. G865 BU +12 Volt Switch Power
439 YL Lamp Indicator 900 PU XMSN Shift Sol No. 5 or 4
441 OR Eng Coolant Temp Gauge 901 WH XMSN Shift Sol No. 6
A429 YL Articulation Indicator 902 BR XMSN Shift Sol No. 7
A476 PU Eng Oil Press Gauge To Sender - Eng #1 903 GY XMSN Shift Sol No. 8
B476 BU (NFND) Transmission Indicator Lamp 921 WH XMSN Sol No 1 Or 3 Return
C491 PU Park Brake Pressure E937 PU MG MESH CNTL - Redundant Neutral
E458 YL Low Air Pressure Lamp E938 OR MG MESH CNTL - First Gear
E459 WH Low AIr Pressure Alarm E939 WH MG MESH CNTL - Second Gear
E460 BR Trans Cntl To Relay Coil E940 BU MG MESH CNTL - Third Gear
G460 GN Transmission Temperature E941 YL MG MESH CNTL - Fourth Gear
Accessory Circuits
E942 GN MG MESH CNTL - Fifth Gear
500 BR Wiper - Front (Park) E943 BR MG MESH CNTL - Sixth Gear
501 GN Wiper - Front (Low) E944 GY MG MESH CNTL - Seventh Gear
502 OR Wiper - Front (HI) E945 PU MG MESH CNTL - Eighth Gear
503 BR Wiper - Rear (Park) E946 OR MG MESH CNTL - Forward Direct
504 YL Wiper - Rear (Low) E947 WH MG MESH CNTL - Reverse Direct
505 BU Wiper - Rear (HI) E948 BU MG MESH CNTL - Park
E949 YL MG MESH CNTL - Neutral
E975 PU MESH Lamp
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
2W-9346 Stop Lamp Pressure
45 kPa MAX
(6.5 psi MAX)
5 kPa MIN
(0.5 psi MIN)
NormallyOpen
8C-3569 Coolant Temperature (Start Aid)
38 ± 3°C
(1 00.4° ± 5.4°F)
27 °C MIN
(80.6°F MIN)
NormallyClosed
111-7088 Inching Pedal Pressure
75.0 kPa MAX
(10.9 psi MAX)
50.0 kPa MIN
(7.3 psi MIN)
NormallyOpen
112-2024
Brake Air
Park Brake Pressure
640 kPa MAX
(92.0 psi MAX)
530 ± 40 kPa
(77.0 ± 6.0 psi)
NormallyOpen
115-7103 Fuel Pressure (EMS)
93 ± 21 kPa
(13.5 ± 3.0 psi)
69 ± 21 kPa
(10.0 ± 3.0 psi)
Normally Closed
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
3E-5383 Sender - Articulation Position Range - 3 to 97 Ohms
7N-8532 Sender - Engine Coolant Temp
560 to 716 @ 54°C (130°F)
72 tO 82 @ 110°C(230°F)
7T-4003 Resistors - Defroster Blower 10.0 ± 0.5
7T-9073 Solenoid - Differential Unlock 33.6 ± 1.0
7T-9074
Solenoids - Forward Horn
Park Brake
55.17 ± 5.77
8C-3663
Solenoid - Engine Shutdown
Start (Latch) Coil
Stop (Unlatch) Coil
1.55 ± 0.1510.3 ± 1.03
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 6
104-6387 Sender - Transmission Speed 1000 to 1200
111-0570 Solenoid - Dual Horsepower 31.1 ± 2.4
116-9937 Sender - Engine Oil Pressure
21.5- 49.5 @552 kPa (80.1 psi)
227 - 257 @ 21 kPa (3.0 psi)
127-0574 Solenoids - Transmission 31 ± 3
¹ At room temperature unless otherwise noted.
RENR1440
January 1998
120H, 135H Motor Grader
Electrical System
120H:
5FM1-799
6TM1-365
135H:
7MM1-248
8WN1-349
(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.
1998 Caterpillar
All Rights Reserved
Printed in U.S.A.
©
ALL DASHED LINES ARE ATTACHMENTS.
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.
PANEL LAMP CIRCUIT.
WIPER/WASHER CIRCUIT.
DEFROSTER AND HEATER CIRCUIT.
GROUND CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
2
1
4
3
8
2
7
1
6
9
5
4
3
2
10
1
1
2
C
B
A
200-BK
608-GN 608-GN
G
S
T
109-OR-10
604-OR
614-PU
321-BR
321-BR
200-BK
614-PU
604-OR
BACKUP
ALARM
3T-1815
326-PU
200-BK-10
301-BU-10
306-GN
304-WH-10
101-RD-4
200-BK-4
200-BK
903-GY
ALTERNATOR
BREAKER
2H-1507 STD
9S-0174 ATCH
902-BR
901-WH
921-WH
900-PU
755-OR
754-BU
752-YL
200-BK
921-WH
751-GN
403-GN
109-OR-4
604-OR
614-PU
321-BR
200-BK
200-BK
GND
STOP
921-WH
903-GY
921-WH
902-BR
921-WH
901-WH
921-WH
900-PU
921-WH
755-OR
921-WH
754-BU
921-WH
752-YL
921-WH
751-GN
1
2
2
1
SOL 4
SOL 8
SOL 7
SOL 3
1
2
2
1
1
2
2
1
SOL 2
SOL 6
SOL 5
SOL 1
1
2
2
1
127-0574
127-0574
127-0574
127-0574
127-0574
127-0574
127-0574
127-0574
604-OR
614-PU
200-BK
RD
WH
BK
REAR FLOOD
LAMP
9X-6775
ALTERNATOR
6N-9294 35A STD
100-5047 50A ATCH
RELAY
3E-7279
40A
109-OR-4
ALT
+
R
1
3
2
STOP/TAIL
LAMP
8C-6207
INCHING PEDAL
PRESSURE SW
(TRANSMISSION)
111-7088
BK
BK
F
202-BK
758-GN
758-GN
202-BK
D
200-BK
200-BK
200-BK
B
B
B
B
Y
Y
Y C
2
1
L69
L69
L69
L46
L46
L51 L51
L51
L50
L50
SHUTDOWN
SOL
8C-3663
Y
Y
200-BK
556-WH
L27
F
G460-GN
G865-BUOR-18
BK-18
GROUND
V+
SIGNAL
YL-18
TRANSMISSION
OIL TEMP SW
136-2632
202-BK
G865-BU
G460-GN
V EEEE
DIFFERENTIAL
UNLOCK SOLENOID
7T-9073
1
2
GN
GN
202-BK
710-GN
1
2
556-WH
105-8827 DIODE AS.
101-RD-4
Y
Y
Y Y
Y
200-BK
1
2
F
N
N
N
N
N
N
B
HHDD
N
N
D
E
D
D
200-BK
60A
N
2
1
2
3
4
1
5
5
4
3
1
1
2
2
1
3
2
1
2
6
1
2
TRANS SPD SENDER
104-6387
710-GN
202-BK
L69
200-BK
608-GN
101-RD-4
200-BK
°T
608-GN
RD-00
BK-00
200-BK
795-YL
BK-00
REAR
FRAME
311-WH
310-PU
1
2
BK-18
BK-18
SOLENOID
9G-4365
G
COOLANT TEMP
SENDER
7N-8532
1
3
2
106-8558
200-BK
614-PU
604-OR
301-BU-10
304-WH-10
441-OR
STOP/TAIL
LAMP
8C-6207
DISCONNECT SW
7N-0718
RD-00
BK-00
ENGINE
BK-00
BK-00
12V BATTERY
3T-5760
G
S
MTR BAT
MOTOR
NEGPOS
NEG POS
RD
WH
BK
604-OR
614-PU
200-BK
608-GN
200-BK
REAR FLOOD
LAMP
9X-6775
T
S
B
B
B
B
B
B
B
200-BK
Y
Y
200-BK
C
C
E459-WH
A476-PU
441-OR
311-WH
200-BK
608-GN
403-GN
311-WH
310-PU
E458-YL
200-BK
200-BK
L50
L50
L51
L52
200-BK
200-BK-10
L52
L54
L55
L56
REAR
FRAME
BK-18
12V BATTERY
3T-5760
DUAL HORSEPOWER
SOLENOID
111-0570
WH-18
B
C
FUEL SW
115-7103
B
E459-WH
E458-YL
RD-18
QQ
BU-18
LL
UU
UU
BK-18
BK
BK 200-BK
COOLANT SW
8C-3569
°T
311-WH
B
1
2
L53
Y
7
HHDD
795-YL
YHH
D
SS
SSRR
QQ
RRTT
TT
200-BK
200-BK-4
326-PU
V
306-GN
710-GN AND
202-BK ARE
TWISTED PAIR
NOTE D
BK
B
310-PU
311-WH
A476-PU
ENGINE OIL
PRESSURE
SENDER
116-9937
6
BK
3
2
4
6
7
9
5
8
1
4
5
8
3
2
2
7
6
5
4
3
2
1
1
5
4
3
2
1
5
6
4
3
2
1
2
1
101-RD-4
L46
10
101-RD-4
200-BK
200-BK
C491-PU
608-GN
A476-PU
E458-YL
124-GN
113-OR
105-BR
200-BK
441-OR
441-OR
E458-YL
608-GN
A476-PU
L67
L67
L67
L56 L56
L56
L56
L55
L55
L55
L55
L54 L54
L54 L54
L63
L16
L16
L44
L44
7
6
L38
200-BK
A429-YL
900-PU
795-YL
306-GN
101-RD-4
1
326-PU
310-PU
G460-GN
G865-BU
903-GY
902-BR
200-BK
A429-YL
755-OR
754-BU
921-WH
752-YL
901-WH
102-BU
101-RD
751-GN
403-GN
L65
108-BU
200-BK
L65
DOME LAMP
8C-9678
3
2
1
BK
RD
WH
SERVICE
METER
3E-9359
200-BK101-RD + -
JJ
556-WH
101-RD-10
HEADLAMP
BREAKER
3T-2662
15A
758-GN
FUSE BLOCK
9G-0747
200-BK
202-BK
403-GN
L27
L23
L22
EEEE
G
202-BK
710-GN
J
J
A
A
J
AA
A429-YL
K
A
C
AC
E459-WH
G
F
GF
C
A
403-GN
609-YL
608-GN
165-YL
130-GN
3K8782 FUSE (10A)
8M8948 FUSE (15A)
J
101-RD
SIG
L53
101-RD-4
101-RD-10
1
403-GN
710-GN AND 202-BK
ARE TWISTED PAIR
NOTE D
101-RD-10
1
2
3
2
1
2
1
4
5
1
2
2
4
1
5
3
2
1
2
1
3
8
5
6
4
7
C491-PU
200-BK
308-YL
PARK BRAKE
PRESS SW
112-2404
PARK BRAKE
SOLENOID
7T-9074
GN
GN
BK-18
200-BK
BK-18
200-BK
200-BK
321-BR
SENDER
3E-5383
A429-YL
200-BK
A507-YL
200-BK
RD
BK
200-BK
603-PK
200-BK
504-YL
119-PK
503-BR
505-BU
603-PK
A504-GN
A507-YL
BLOWER
9X-0343
604-OR
556-WH
614-PU
321-BR
604-OR
504-YL
119-PK
503-BR
505-BU
GND
PARK
B+
GN
GY
BR
OR
4
2
3
1
HI
LO
MOTOR
°T
BK
DEFROSTER
9X-9657
MOTOR
L67
L54
L55
L56
L51
L44
L63
L38
L7
L36
L36
L36
L41
L41
L41
L41
L20
L20
1
2
RESISTOR
7T-4003
BEACON
9X-9556
BULB
9X-7849
1
2
REAR WIPER
9X-3392
4
200-BK
200-BK
200-BK
200-BK
556-WH
200-BK
200-BK
H
L29
L29
522-WH
B476-BU
308-YL
H
H
VV
VV
A
AE
H
H
H
A
C
614-PU
200-BK
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
MOTOR
PK
GY
BU
WH
RD
BK
BR
PU
TRANSMISSION ACTION
LAMP RELAY
106-9188
308-YL
308-YL
B476-BU
A
3
4
5
2
1
200-BK
614-PU
HEATER GP 8C-9787
X
L42
E460-BR
U
614-PU
FRONT FRAMEREAR FRAME
7
6
5
4
3
2
1
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
619-GN
200-BK
200-BK
609-YL
614-PU
614-PU
200-BK
200-BK
614-PU
614-PU
200-BK
200-BK
200-BK
308-YL
3
2
L65
L16
L65
L12
L16
609-YL
614-PU
2
5
1
3
4
6
200-BK
614-PU
308-YL
614-PU
310-PU
A429-YL
116-BR
614-PU
200-BK
103-YL
6
4
3
609-YL
1
5
2
614-PU
HEADLAMP/
TAIL SW
3E-9317
439-YL
113-OR
200-BK
609-YL
2
1
614-PU
102-BU
556-WH
308-YL
322-GY
114-GN
611-PU
619-GN
614-PU
2
3
200-BK
614-PU
556-WH
L12
L12
L65
L65
L65
322-GY
2
1
130-GN
105-BR
124-GN
113-OR
165-YL 608-GN
116-BR
114-GN
149-PU
103-YL
STOP LAMPS
KEY SW
HEATER
DIFF LOCK
HORN
REAR FLOODS
556-WH
BLADE FLOODS
614-PU
619-GN
10A
619-GN
441-OR
C491-PU
A476-PU
308-YL
611-PU
HEADLAMP DIMMER SW
103-5678
149-PU
614-PU
FLOOD
LAMP SW
9X-9632
NOTE G
200-BK
614-PU
10A
123-6375
15A
10A
10A
10A
10A
10A
10A
HORN SW
116-2145
200-BK
200-BK
200-BK
DIFFERENTIAL
UNLOCK SW
123-5862
E975-PU
614-PU
614-PU
614-PU
614-PU
200-BK
200-BK
J
J
J
2
3
TAIL
LAMP SW
3E9319
200-BR
614-PU
614-PU
103-YL
L25
L25
L24
L22
L24
L23
L6
L3
J
E458-YL
E458-YL
JNN
L28
E458-YL
308-YL
J
103-YL
BLADE
FLOOD
LAMP SW
123-5849
NOTE F
3
2
B
200-BK
B476-BU
614-PU
614-PU
614-PU
TAIL LAMPS
4
3
9
8
7
6
5
4
3
2
1
6
5
3
4
7
2
2
1
1
2
3
4
5
6
L71
L71
278-BK
278-BK
G
SHIFT CONSOLE
200-BK
200-BK
101-RD-4
614-PU
321-BR
604-OR
614-PU
E459-WH
326-PU
795-YL
306-GN
E460-BR
113-OR
113-OR
439-YL
921-WH
903-GY
902-BR
901-WH
900-PU
755-OR
754-BU
752-YL
751-GN
308-YL
200-BK
326-PU
307-OR
614-PU
105-BR
308-YL
307-OR
321-BR
202-BK
9G-9813
308-YL
326-PU
307-OR
B751-BU
105-BR
165-YL
RD
BK
ST
ON
OFF
B
306-GN
795-YL
S
C
R
CENTERSHIFT
PIN SW
9X-9634
200-BK
20
202-BK
U
U
308-YL
U
U
U
U
U
200-BK
200-BK
200-BK
200-BK
892-BR
202-BK
G460-GN
277-BK
G
124-GN
614-PU
165-YL
893-GN
B751-BU
RED NEUT
202-BK
202-BK
J
614-PU
202-BK
U U
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
24
TRANSMISSION DIRECTION
AND SPEED SW.
8C-5337
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
FIRST
GROUND
EIGHTH
SECOND
THIRD
FOURTH
FIFTH
614-PU
200-BK
SIXTH
SEVENTH
E943-BR
FORWARD
REVERSE
PARK
NEUTRAL
E937-PU
202-BK
E938-OR
E939-WH
E940-BU
E941-YL
PANEL LAMP
(SHIFT LEVER)
7N-5876
NOTE B
E942-GN
E944-GY
E945-PU
E946-OR
E947-WH
E948-BU
E949-YL
202-BK
202-BK
3
1
2
308-YL
E459-WH
2
H
E975-PU
G
TRANSMISSION CONTROL
106-4458
10
B751-BU
9G-7641
202-BK
L20
L44
L63
L38
L7
L36
L7
L7
L36
L36
L36
L38
L38
L26
L26
L26
L28
L28
308-YL
L43
L43
L43
L43
L42
L42
L44
L44
G
L63
L63
F
A
758-GN
G865-BU
C
277-BK
G460-GN
E949-YL
E948-BU
E947-WH
E946-OR
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
E975-PU
E941-YL
307-OR
E940-BU
308-YL
E939-WH
202-BK
E938-OR
G
202-BK
G
L17
L17
L15
L15
L14
L14
SERVICE
TOOL
CONNECTOR
9W-1951
L6
B
A
9
E937-PU
893-GN
892-BR
E
NEUTRAL
CONTROL
117-9364
G
202-BK
307-OR
E948-BU
E949-YL
SOL 1 OUTPUT
SW 2 INPUT
BAT +
SW 1 INPUT
SOL 2 OUTPUT
GROUND
306-GN
710-GN
D
308-YL
308-YL
308-YL
308-YL
308-YL
U
U
A
308-YL
308-YL
308-YL
19
202-BK
STEERING CONSOLE
G
202-BK
306-GN
113-OR
202-BK
E459-WH
G460-GN
892-BR & 893-GN
ARE TWISTED PAIR
NOTE D
E460-BR
6
101-RD-10
L71
113-OR
439-YL
5
1
4
3
4
8
7
1
3
2
6
2
5
2
5
7
9
3
4
6
8
1
200-BK
L76
L76
200-BK
L76
L76
200-BK-8
L19
L16
L12
L21
L21
L21
L21
L62
L19
L21
L21
L62
L62
L62
L62
L16
L16
L12
E975-PU
A506-OR
A503-PK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
- +
200-BK
-+- +
REAR
WASHER
7T-8891
FRONT UPPER
WASHER
7T-8891
507-WH
506-PU
578-BU
FRONT LOWER
WASHER
7T-8891
507-WH
200-BK
FRONT
FRAME
200-BK
200-BK-6
202-BK
200-BK-8
108-BU
200-BK
200-BK
200-BK
200-BK
200-BK
4
CAB
GROUND
611-PU
619-GN
114-GN
322-GY
BLOWER
9X-0343
DEFROSTER
9X-9657
A506-OR
200-BK
MOTOR
MOTOR
501-GN
118-GY
500-BR
502-OR
RESISTOR
7T-4003
RD
BK
609-YL
200-BK
GND
PARK
B+
GN
GY
BR
OR
4
2
3
1
HI
LO
MOTOR
°T
GND
PARK
B+
HI
LO
MOTOR
°T
BK
FRONT
FRAME
MOTOR
1
2
MOTOR
200-BK-6
A506-OR
K
614-PU614-PU
614-PU
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
M
M
A
A
LAMP
8M-6176
VOLTMETER
COOLANT
TEMP
A429-YL
M
M
308-YL
M
CLUSTER
127-8314
WH
RD
OR
PU
GN
GY
PK
YL
BK
(12 V)
(24 V)
(12 V)
(24 V)
IGN
SEND
GRD
IGN
SEND
GRD
IGN
SEND
GRD
L4
L4
M
M
AA
AA
AA
K
K
K
K
A
ZZ
ZZ
200-BK
308-YL
E458-YL
E458-YL
614-PU
A476-PU
200-BK
439-YL
308-YL
B476-BU
B476-BU
INSTRUMENT PANEL
ENGINE OIL
PRESSURE
M
M
200-BK
TRANS
ACTION
LAMP
7N-5876
NOTE B
200-BK
M
AIR
PRESSURE
LAMP
7N-5876
NOTE B
M
200-BK
PARKING
BRAKE
LAMP
7N-5876
NOTE B
C491-PU
308-YL
C491-PU
614-PU
A476-PU
614-PU
441-OR
200-BK
A429-YL
441-OR
113-OR
439-YL
200-BK
614-PU
200-BK
614-PU
200-BK
C'SHIFT PIN
INDICATOR
LAMP
7N-5876
NOTE B
GRD
R/S SYSTEM
AIR PRESS
1W-3306
LAMP
7N-5876
NOTE B
L/S SYSTEM
AIR PRESS
1W-3306
LAMP
7N-5876
NOTE B
M
M
M
SEND
M
TRANS
LAMP
7N-5876
NOTE B
200-BK
M
M
E975-PU
IGN
8
5
7
6
4
2
1
3
4
8
7
2
3
6
1
6
3
5
7
4
5
2
1
2
1
9
5
3
4
6
8
7
10
L71 L71
L71
K
K
L
S
S
S
S
S
S
L
L
L
L
L
L
L
L
L L
L
L
L
L
L
L
L
L
L
L
L
L
578-BU
L
L
L
L
L
L
L
L
L
L
577-PU
576-PK
575-YL
506-PU
505-BU
504-YL
119-PK
REAR
DEFROST SW
9X-9638
FRONT
DEFROST SW
9X-9638
152-BU
152-BU
152-BU
200-BK
119-PK
119-PK
H
L
B B
P
W
L
W
P
B
503-BR
B
L
W
H
P
B
507-WH
119-PK
119-PK
118-GY
506-PU
578-BU
507-WH
575-YL
577-PU
576-PK
152-BU
101-RD-10
614-PU
L
L
200-BK
614-PU
144-GN
603-PK
3
118-GY
118-GY
118-GY
A
200-BK
L76
L76
584-YL
584-YL
4K-5122 HOLDER AS.
3K-8782 FUSE
614-PU
200-BK
L19
L62
L5
L5
L20
L20
L21
L18
L18
L18
L18
L7
L7
L7
L7
L7
L7
2
200-BK
200-BK
FRONT LOWER
WIPER SW
3T-6655
200-BK
118-GY
152-BU
119-PK
141-PK
151-GN
108-BU
144-GN
A503-PK
A506-OR
584-YL
2
151-GN
5
200-BK
200-BK
200-BK
1
584-YL
3
4
A504-GN
6
A507-YL
200-BK
604-OR
130-GN
101-RD-10
507-WH
200-BK
141-PK
614-PU
101-RD
507-WH
578-BU
506-PU
118-GY
501-GN
500-BR
502-OR
200-BK
A507-YL
A504-GN
603-PK
119-PK
505-BU
503-BR
504-YL
FRONT UPPER
WIPER SW
3T-6655
BEACON SW
9X-9639
101-RD
152-BU
200-BK
FRONT LOWER
WIPER
9X-3392
576-PK
152-BU
575-YL
577-PU
108-BU
A503-PK
A506-OR
152-BU
576-PK
575-YL
577-PU
GN
GY
BR
OR
4
2
3
1
BK
UPPER WIPER/WASHER
LOWER WIPER/WASHER
REAR WIPER/WASHER
FRONT DEFROSTER
REAR DEFROSTER
DOME LAMP
BEACON
10A
10A
10A
10A
10A
10A
10A
B
6
L
H
4
3
119-PK
200-BK
502-OR
614-PU
200-BK
1
5
101-RD
101-RD
101-RD
101-RD
101-RD
101-RD
L
501-GN
FRONT UPPER
WIPER
9X-3392
500-BR
2
200-BK
200-BK
L10
L10
L14
L14
L13
L13
L11
L11
L9
L9
L8
L8
A
15 14 13 12 11 10 9 8 7
6
5 4
3 2
1
15 14 13 12 11 10 9 8 7
6
5 4
3 2
1
A
K
L
L
KK
A
K
LH
200-BK
506-PU
578-BU
575-YL
577-PU
576-PK
101-RD
152-BU
REAR
WIPER SW
3T-6655
200-BK
CAB SWITCH AND FUSE PANEL
200-BK
200-BK
200-BK
200-BK
619-GN
619-GN
611-PU
611-PU
P
P
EEEE
L1
200-BK
OPERATOR STATION
CIRCUIT GROUPING
DESIGNATION
609-YL 609-YL
609-YL
L2
L#
P
P
CC
A
P
A
A
FORWARD
HORN
7T0969
NOTE E
114-GN
322-GY
619-GN
611-PU
Z
V
X
Y
Z
AA
CC
DD
HH
136-3153
124-1429
126-8197
8W-1978
101-8197
101-8190
101-8192
101-8193
00
00
01
02
01
02
01
03
(TOS)
(HEATER GP)
(FUEL TANK)
(FORWARD HORN)
(HEADLAMP BREAKER)
(BLADE FLOOD LAMP)
(REAR FLOOD LAMP)
(REAR FLOOD LMP-FUEL TNK)
210 ATCH
154 ATCH
230
121
141 ATCH
106 ATCH
205 ATCH
206 ATCH
NOTECHG
ATCH WIRE, CABLE &
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
LOC
WIRE AS.
HARNESS AS.
IDENT
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
1
2
611-PU
619-GN
200-BK
CONNECTOR
200-BK
SYMBOL DESCRIPTION
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
Z
Z
ORANGE
WHITE
RED
BR
PU
GY
609-YL
200-BK
1
2
L
N
P
S
U
A
B
C
D
E
127-0879
127-2246
127-1641
126-7238
126-7570
01
01
00
00
00
(PLATFORM)
(ENGINE)
(R FRAME-ENGINE)
(RADIATOR GRILL)
(R FRAME)
120
220
200
203
201
F
G
H
J
K
127-1029
137-1718
137-1722
101-8161
138-1947
127-0908
00
00
00
02
00
00
(SW PANEL)
(R FRAME-TRANS)
(XSMN CONSOLE)
(CAB-REAR)
(STEERING CONSOLE)
(CAB-FRONT)
180 ATCH
202
170
182 ATCH
140
181 ATCH
1
2
3
4
5
LEVEL
NN 116-2145 00 (HORN SWITCH) 143
619-GN
200-BK
200-BK
611-PU
LO BEAM
HEADLAMP
9X-7169
HI BEAM
HEADLAMP
9X-7170
BLADE
FLOOD
LAMP
9X-6775
1
2
3
4
1
2
2
1
200-BK
L71
200-BK
P
P
BRAKE AIR SW
112-2404
BK-18
BRAKE AIR SW
112-2404
BK-18
439-YL
113-OR
A
3
BK-18
2
L5
L1
L1
4
1
WH-18
BK-18
A
L3
L2
P
P
A
A
A
A
CCA
GN
GN
WH-18
NOTE E: ONLY ONE FORWARD HORN SHOULD BE INSTALLED
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
CENTERSHIFT
SOLENOID
8T-8808
RR
SS
TT
VV
ZZ
1
2
B751-BU
200-BK
CABLE AS.
GN
GN
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
UNLESS OTHERWISE SPECIFIED: ALL WIRES IN A SPLICE
AND XMSN SHIFTER IN NEUTRAL
6R
5R
4R
3R
114-GN
322-GY
1
2
A
FORWARD
HORN
SOLENOID
7T-9074
NOTE E
2R
1R
8F
7F
6F
5F
4F
3F
2F
1F
N
PARK
STOP LAMP
SW
2M-9346
E458-YL
E458-YL
WH-18
CENTERSHIFT
INDICATOR SW
3E-9367
130-GN
604-OR
E458-YL
200-BK
E458-YL
200-BK
TRANSMISSION SHIFT LEVER LOGIC TABLE:
NOTE B: TERMINAL
SPRING
SOCKET
CONTACT
BOOT
3T-3157
3T-3159
3T-3158
6D4161
3T-3278
TO
GND
NOTE C:
24V OUTPUTS
NEU
SOL
RET
8
W/
AWD
76
SOLENOIDS
D
HP
GEAR 5
B
U43
S
T2
609-YL
200-BK
OPERATOR STATION
1
WH-18
1
2
619-GN
200-BK
611-PU
200-BK
LO BEAM
HEADLAMP
9X-7169
HI BEAM
HEADLAMP
9X-7170
BLADE
FLOOD
LAMP
9X-6775
F
E
D
C
B
A
F
E
D
C
B
A
TRANSMISSION SOLENOIDS
CONN 2
CONN 1
CONN 3
START
START
START AID
STARTER
ARTICULATION
KEY START SW
START
DIA CODE 2
DIA CODE 1
INCH PEDAL
TMP SW/DC0
+BATTERY
PARK
REVERSE
FORWARD
EIGHTH
SEVENTH
SIXTH
FIFTH
FOURTH
THIRD
SECOND
FIRST
RED NEUTR
CAT LINK +
(N) NEUT
BUFF TOS
UNUSED
GROUND
NEUTRAL
TOS + INP
+12V
SOLE RETN
SOLENOID 8
SOLENOID 7
SOLENOID 6
SOLENOID 5
SOLENOID 4
SOLENOID 3
SOLENOID 2
SOLENOID 1
EMS OUT
DUAL HP
CAT LINK -
BU ALARM
A/M LAMP
START SW.
ARTICULATION
PART NO.
QQ
UU
LL
5T-1553
110-6399
115-6908
7G-1060
1S-2342
111-0871
061-7661
8Y-9603
01
01
00
00
02
00
03
01
(NEG BAT/DISCONNECT SW)
(DISCONNECT SW TO GND)
(NEG BAT TO POS BAT)
(GND-R FRAME TO F FRAME)
(GND-F FRAME TO CAB)
(POS BAT TO START MTR)
(START MTR TO FRAME GND)
(START MTR TO ENGINE)
211
212
213
204
105
210
214
221
ACTION ALARM
GAUGES
GAUGE
GAUGEGAUGE
M
104-8588
137-1120
127-1036
127-1030
126-9166
137-5114
02
02
00
01
00
00
(TRANS SPEED SENDER)
(TRANSMISSION)
(HEADLIGHTS-BAR)
(CAB FUSE PANEL)
(XSMN CONSOLE-SWITCHES)
(GAUGE CONSOLE)
271
270
100 ATCH
183 ATCH
171
160
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAUGE
ARE THE SAME IDENT. NUMBER, COLOR, AND 16 GAUGE
TO MACHINE STRUCTURE
THIS SCHEMATIC IS FOR THE 120H AND 135H
STANDARD SERIES MOTOR GRADER (145-5118)
CONN 4
CONN 5
CONN 6
CONN 7
CONN 8
CONN 14
CONN 9
CONN 10
CONN 11
CONN 12
CONN 13
CONN 15
CONN 18
CONN 16
CONN 17
310-PUN
CONN 19
A
CONN 20
CONN 24
CONN 25
CONN 26
CONN 29
CONN 30
CONN 27
CONN 28
CONN 23
1
8
CONN 22
CONN 32
CONN 31
CONN 34
CONN 33
CONN 21
E19487
START AID SW
