©
2001 Caterpillar
All Rights Reserved
Printed in U.S.A.
515 & 525 Wheel Skidder
Electrical System
515 525
4LR1-UP 1DN524-UP
SENR1361-01
April 2001
For Cable Machines
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 C-9 1
CONN 2 D-9 5
CONN 3 C-8 A
CONN 4 B-7 A
CONN 5 C-5 B
CONN 6 Service Tool D-5 B
CONN 7 Service Mode Plug D-5 B
CONN 8 Harness Code Plug E-5 B
CONN 9 C-4 C
CONN 10 D-3 C
CONN 11 B-2 C
CONN 12 A-2 C
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.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Action D-5
B
Sender - Converter D-9
20
Alarm - Backup B-9
1
Sender - Coolant D-3
20
Alternator C-2 21 Sender - Fuel Level B-9
2
Batteries - 12V F-2
23
Sender - Hydraulic D-3
18
Breaker - Lamps Circuit (15A) A-2 C Solenoid - Diff Lock C-9
3
Breaker - Main (80A) A-3
C
Solenoid - Fuel Shut Dn C-2
C
Control - Caterpillar Monitoring System E-4
B
Solenoid - Start Aid E-2
18
Control - Relay C-3
C
Solenoids - CST Valve D-9,E-9
13
Control - Secondary Steering E-3
C
Suppressor - Arc C-9
20
Control - Shift B-5
B
Switch - Accumulator Charge Pressure C-3
C
Gage - Quad F-4
B
Switch - Coolant D-1
20
Ground - Frame C-2,F-2
21
Switch - Diff Lock B-7
A
Ground - Lower Cab A-7
9
Switch - Disconnect F-2
21
Ground - Lower Cab - Frame A-7
9
Switch - Cat Monitoring System Select C-5
B
Ground - Platform B-7
9
Switch - Engine Oil Press D-2
19
Ground - To Cab Roof E-8
A
Switch - Forward Horn B-6
B
Ground - To Engine Block C-2 21 Switch - Front Differential Pressure F-5
12
Holder - Fuse B-3
C
Switch - Front Lamp D-6
14
Horn - Forward D-1
11
Switch - Key C-6
B
Lamp - Action D-5
B
Switch - Park Brake D-3
C
Lamp - Primary Steering Press Warning B-6
B
Switch - Primary Steering Pressure F-3
3
Lamp - Quad Gauge F-4
B
Switch - Rear/Center Lamp D-6
14
Lamp - Secondary Steer Press Warning B-6
B
Switch - Secondary Steering Pressure E-3
3
Motor - Sec Steer D-2
3
Switch - Secondary Steering Test B-6
B
Motor - Starting C-2
19
Switch - Start Aid C-7
B
Receptacle - Auxiliary Start F-2
21
Switch - Xmsn Neutral Lock C-6
B
Relay - Main A-2 C Switch - Xmsn Press Filter F-7
13
Relay - Sec Steer D-2
C
Switch As. C-6
B
A = Components in right console area.
B = Components in dash area.
C = Components in relay panel area.
Related Electrical Service Manuals
Form Number
Alternator: 114-2401
SENR7508
Starting Motor: 6V-5207 (42MT)
SENR3581
6V-5023 (KE 7.5)
SENR3536
6V-5226 (F8.0)
SENR4975
Caterpillar Monitoring System:
SENR1394
Shift Control:
SENR6685
Title
Part No. Resistance (Ohms)¹
3E-6332 Solenoid - Start Aid 6
4W-9972 Sender - Hydraulic
560 to 716 at 54 °C
72 to 72 at 110 °C
7N-8532 Sender - Converter/ Coolant
560 to 716 at 54 °C
72 to 72 at 110 °C
152-8385 Solenoid - Diff Lock 32.6 ± 1.6 at 25 ± 5 °C
155-4653 Solenoid - Fuel Shut Dn
Latch 1.55±10%
Unlatch 10.3±10%
157-8852 Sender - Fuel Level Empty 96 ± 3; Full 1.75 ± 1.75
186-1526 Solenoids - CST Valve 31±3 at 25±5 °C
Component Description
Resistor, Sender and Solenoid Specifications
¹ At room temperature unless otherwise noted.
Machine Harness Connector And Component Locations
C
B
A
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
C
B
A
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
7
6
5
4
3
2
1
1
8
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.
14 Parameter failures.
15 Parameter failures.
16 Parameter not available.
17 Module not responding.
18 Sensor supply fault.
19 Condition not met.
20 Parameter failures.
¹The FMI is a diagnostic code that indicates what type of failure has occurred.
Service Mode Number
Operator Mode Sequence 0
Harness Code 1
Numeric Readout 2
Service 3
Digital Tattletale 4
Monitoring System Modes
Component Identifiers (CID¹)
Module Identifier (MID²)
Caterpillar Monitoring System
(MID No. 030)
CID Component
0096 Fuel Level Sender
0100 Engine Oil Pressure Sensor
0110 Engine Coolant Temperature Sensor
0177 Torque Converter Oil Temperature Sensor
0248 Data Link
0263 Sensor Power Supply
0271 Action Alarm
0324 Action Lamp
0600 Hydraulic Oil Temperature Sensor
0819 Display Data Link
0821 Display Power Supply
0830 Brake Oil Temperature Sensor
Electronic Transmission Control System
(MID No. 081)
CID Component
0070 Parking Brake Switch
0149 Ride Control Solenoid 2
0168 Electrical System Voltage
0190 Engine Speed Sensor
0248 CAT Data Link
0356 Tilt Dump Solenoid 1
0363 Ride Control Solenoid 1
0367 Ride Control Switch
0368 Transmission Auto/Manual Switch
0596 Implement ECM
0621 Downshift Switch
0622 Upshift Switch
0623 Directional Switch
0631 Transmission Clutch 1 Solenoid
0632 Transmission Clutch 2 Solenoid
0633 Transmission Clutch 3 Solenoid
0634 Transmission Clutch 4 Solenoid
0635 Transmission Clutch 5 Solenoid
0636 Transmission Clutch 6 Solenoid
0638 Starter Solenoid
0650 Harness Code
0671 Transmission Output Speed Sensor
0687 Options ID Code
1521 Part-Throttle Autoshift Selector Switch
¹ The CID is a diagnostic code that indicates which component is faulty.
² The MID is a diagnostic code that indicates which electronic control module
Machine Code
515 59
525 60
Machine Codes
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.
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Monitoring Circuits
101 RD Bat (+) 411 PK Action Lamp
103 YL Panel Lamps/Gauges 417 GY Secondary Steering Control
105 RD Key Start Switch 419 YL Park Brake Pressure Sw.
108 BU To Seat 426 BR Xmsn Filter Switch
109 RD Alt Output (+) Term. 432 PK Accumulator Charge Pressure Switch
112 PU Main Power Relay Output 441 OR Coolant Sender
114 RD Forward Horn 442 GY Hydraulic Sender
115 RD Std. Lamps 443 YL Converter Sender
124 GN Blower Motor 447 PK Fuel Level Sender
126 PK Battery +24V 453 PK Secondary Steering Pressure Switch
127 OR Rear/Center Lamp Switch 484 YL Primary Steering Pressure Switch
136 GN Tranmission Control 498 WH Differential Lock
136 RD Secondary Steering
Lighting Circuits
165 YL Differential Lock Switch 607 PK Front Flood Lamp
608 GN Rear Flood Lamp
200 BK Main Chassis 614 PU Switch Lamps
201 BK Operator Monitor Return 630 GY Front Flood Lamp
202 BK Xsmn Ground
Control Circuits
270 BK Harness Code 0 727 GN Secondary Steering Test Switch
271 BK Harness Code 1 751 GN #1 CST Solenoid Valve
272 BK Harness Code 2 752 YL #2 CST Solenoid Valve
273 BK Harness Code 3 754 BU #3 CST Solenoid Valve
274 BK Harness Code 4 755 OR #4 CST Solenoid Valve
275 BK Harness Code 5 900 PU #5 CST Solenoid Valve
290 BK Service 901 WH #6 CST Solenoid Valve
291 BK Clear 921 WH Solenoid Return
944 OR CAT Data Link +
301 BU Starter No. 1 Sol 945 BR CAT Data Link -
304 WH Starter Relay No. 1 Output 991 WH Xsmn Neutral Lock
306 GN Starter Relay Coil C436 BU Front Differential Pressure Switch
307 OR Key SW C413 YL Module Data
308 YL Main Power Relay Coil C414 BU Module Load
310 PU Start Aid SW To Start Aid Sol E707 GN Cluster +V
311 WH Start Aid Sol To Temp SW E708 PK Module Clock
321 BR Bckp Alarm E735 PU Operator Switch Input
322 GY Forward Horn Switch G750 BU Forward Sw.
322 GY Warning Horn (Forward) G755 GY Reverse Sw.
324 BU Diff Lock Switch to Diff Lock Solenoid G760 WH Upshift (N/O)
326 RD Key SW "C" Term. G761 YL Downshift (N/C)
Monitoring Circuits
G762 BR Downshift (N/O)
403 GN Alternator (R) Term. G763 PU Neutral Sw.
405 GY Opr Mon Oil Press. (Low Setting) G768 GN Upshift (N/C)
410 WH Action Alarm
Basic Machine Circuits
Ground Circuits
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6625 Coolant Temperature
38 ± 3°C
(100.4 ± 5.4°F)
27 °C
(80.6°F MIN)
Normally Closed
3E-7806 Accumulator Charge Pressure
9500 kPa
(1377 psi MAX)
8300 ± 350 kPa
(1200 ± 50psi)
A-B: Normally Open
A-C Normally Closed
3E-7808 Secondary Steering Pressure
1100 kPa MAX
(160 psi MAX)
860 ± 170 kPa
(125 ± 25 psi)
Normally Closed
101-5459 Engine Oil Pressure
90 kPa
(13.0 psi MAX)
70 ± 20 kPa
(10.0 ± 3.0 psi)
Normally Open
117-7773
Front Differential Pressure/
Transmission Pressure Filter
138 ± 28 kPa
(20 psi ± 4 kPa)
69 kPa MIN
(9 psi MIN)
Normally Closed
128-5091 Primary Steering Pressure
551 kPa MAX
(80 psi MAX)
344 ± 20 kPa
(50 ± 3 psi)
A-C: Normally Closed
A-B Normally Open
614-PU-16
614-PU-16
200-BK-16
614-PU-16
202-BK
200-BK-16
201-BK
24
23
22
21
B-9 REAR01126-1489X
115-RD-14
20
614-PU-16
19
200-BK-16
18
2
11
17
9
614-PU
8
7
6
5
12
1
10
201-BK
C436-BU
FRONT DIFFERENTIAL
PRESS SW
117-7773
16
200-BK-8
GND
UNUSED
UNUSED
BR
GY
YL
C
114-RD
15
114-RD
TRANSMISSION SHIFT
LOGIC TABLE
(X=ENERGIZED)
X
X
X
X
X
XX
X
X
X
X
X
X
14
614-PU
614-PU
200-BK-16
614-PU
3R
2R
1R
E735-PU
200-BK-16
E735-PU
614-PU-16
200-BK-16614-PU-16
2
4F
3F
614-PU-16
2F
614-PU-16
V
F
F
F
V
F
1F
F
V
NEUTRAL
F
6543
F
614-PU
36
25
28
20
9
8
19
7
1
4
17
13
6
5
32
3
2
B
A
31
33
30
A
A
A
A
13
21
SOLENOIDS
C-5
G
02118-2943
115-RD-14
V
GEAR
UNLOCKED
LOCKED
BK
BK 1
29
34
35
18
16
15
14
12
11
10
23
24
21
22
39
37
38
2
27
26
3
40
RD-00
200-BK-10
2
F
F
39
38
37
36
35
34
33
32
31
30
29
28
26
25
24
23
22
21
20
19
18
13
9
12
11
9
8
7
6
5
4
3
2
1
202-BK
1
S
201-BK
RD-00
C436-BU
25
24
LOWER CAB
OR
C
BK
RELAY CONTROL
117-9364
RD
22
127-OR
200-BK-16
614-PU-16
1
2
6
BK-00
BK-00
AUXILIARY
START
RECEPTACLE
A
B
C
C436-BU
21
C436-BU
C436-BU
FR DIFF FILTER BYPASS
112-PU-10
112-PU-10
112-PU-10
D
112-PU-10
F
F
12
C
B
200-BK-12
200-BK-16
614-PU-14
630-GY-16
608-GN-16
200-BK-16
607-PK-16
200-BK-16
3
200-BK-16
EMS
SELECT SW
119-4434
F
127-OR
F
202-BK
BK
BK
1
2
SHIFT CONTROL
169-5426
Y
E-500132-5004Y
11
405-GY
201-BK
ENGINE OIL
PRESS SW
101-5459
2
1
BK
403-GN
115-RD-14
200-BK-16
614-PU-16
115-RD-14
614-PU
115-RD-14
201-BK
1
291-BK
4
HARNESS
CODE
PLUG
J
SERVICE
MODE
PLUG
290-BK
8
7
200-BK-16
6
H
G
E
B
A
5
C
D
A
B
5
6
4
2
3
202-BK
201-BK
2
A
B
C
3
D
202-BK
321-BR
201-BK
447-PK
2
1
447-PK
202-BK
FUEL LEVEL
SENDER
157-8852
F
1
127-OR
115-RD-14
10
200-BK-14
4
3
2
1
201-BK-16
321-BR
FRAME
GND STRAP 6Y-6584
STRG COLUMN
2
5
3
6
G
G
16
614-PU-16
ACTION LAMP
123-5182
200-BK-16
5
201-BK
202-BK
079F-4337
004P-7751
L
200-BK-16
G755-GY-16
G761-YL-16
G750-BU-16
G760-WH-16
G768-GN-16
XSMN NEUTRAL LOCK
14
G763-PU-16
200-BK-16
G
G
1
GROUND
XMSN SOLENOID 6
XMSN SOLENOID 5
XMSN SOLENOID 4
XMSN SOLENOID 2
XMSN SOLENOID 1
XMSN SOLENOID 3
SOLENOID RETURN
REAR
FLOOD
LAMP
164-5499
G
G
E
E
E
E
E
E
E
614-PU-16
9
C
C
C
C
630-GY
G
630-GY-16
C
12V BATTERY
115-2422
BK
BK-16
RD-16
NEUTRAL SW
608-GN-16
200-BK-16
G
165-YL
BU-16
202-BK
608-GN-16
630-GY-16
201-BK
103-YL
G
322-GY
201-BK
202-BK
498-WH
324-BU
2
A
1
8
REAR
FLOOD
LAMP
164-5499
6
201-BK
3
5
12
11
10
9
201-BK
8
7
6
5
4
LOWER CAB
200-BK
G
200-BK
202-BK
201-BK
FORWARD SW
8
2
2
3
200-BK-16
2
REVERSE SW
UPSHIFT (N/C)
UPSHIFT (N/O)
A
DOWNSHIFT (N/C)
DOWNSHIFT (N/O)
F
7
201-BK
6
127-OR
4
7
6
5
UNUSED
UNUSED
+ BATTERY
GROUND
KEY SW
DOME LAMP
107-6032
201-BK
201-BK
200-BK-14
01
126-1488
F
178-7503
15
14
10 G763-PU
443-YL
614-PU-16
201-BK
2
1
FRONT
FLOOD
LAMP
164-5499
201-BK
10A
5
SHUTDOWN SOL
UNUSED (GND)
607-PK-16
200-BK-16
200-BK
326-RD
E-3
727-GN
2
136-GN
614-PU-16
200-BK
F
SECONDARY STEERING
TEST SWITCH
143-3001
4
200-BK
F
G
B
447-PK
310-PU
3
2
12V BATTERY
115-2422
A
2
2
201-BK
2 3
F
1
F
ARC SUPPRESSOR
106-8704
453-PK
136-GN
SECONDARY STEERING
PRESSURE WARNING
LAMP
7N-9967
BASE
2G-0151
LOWER CAB
324-BU
200-BK
921-WH
326-RD
1
2
200-BK-16
200-BK-10
3
1
CHASSIS
301-BU-10
484-YL
136-GN
7
A
BK-16
ENGINE
202-BK
614-PU-16
921-WH
308-YL
326-RD
614-PU-16
614-PU-16
307-OR
310-PU
10
8
PD BOX
6
F
727-GN
484-YL
136-GN
453-PK
200-BK-16
326-RD
200-BK
C
1
321-BR
C
4
F
XMSN
DASH
2
326-RD
B
200-BK-16
XSMN NEUTRAL
LOCK SW
119-4435
202-BK
C
Z
PRIMARY STEERING
PRESSURE WARNING
LAMP
7N-9967
BASE
2G-0151
202-BK
202-BK
202-BK
5
BU-16 (ON)
RD-16 (OFF)
B
419-YLPARK BRAKE PRESS SW
A
F
484-YL
453-PK
TO CAB
ROOF
727-GN
UPPER CAB
136-GN
403-GN
308-YL
200-BK
326-RD
CAT DATA LINK+
1
J
F
326-RD
308-YL
200-BK
921-WH
755-OR
136-GN
403-GN
727-GN
Z
3
752-YL
C
A
751-GN
1
2
Z
F-2
126-PK
900-PU
901-WH
751-GN
01
921-WH
3
754-BU
00
4
6I-9412
5
419-YL
126-PK
6
2
7
1
1
8
2
3
991-WH
755-OR
484-YL
453-PK
L24
L24
PU
752-YL
751-GN
754-BU
755-OR
900-PU
L23
L23
WH
L23
901-WH
419-YL
202-BK
200-BK
453-PK
417-GY
754-BU
901-WH
484-YL
J
J
SECONDARY STEERING
PRESSURE SW
3E-7808
PRIMARY STEERING
PRESSURE SW
128-5091
921-WH
G
900-PU
Z
2
200-BK A
C
B
751-GN
4
752-YL
755-OR
921-WH
2
G761-YL
G760-WH
322-GY
4
C
614-PU-16
A
G768-GN
G755-GY
G750-BU
G763-PU
G762-BR
991-WH
C
BK-16
PARK BRAKE
PRESS SW
3E-7807
945-BR
5
202-BK
FUEL SHUT DN SOL
155-4653
C
322-GY
3
F
202-BK
944-OR
BK-00
115-RD-14
S
DIFF LOCK
SW
119-4440
126-PK
127-OR
201-BK
B
A
432-PK
124-4775
BK-00
01124-4774
310-PU
727-GN
607-PK-16
447-PK
443-YL
X
X
403-GN
R PP
202-BK
201-BK
608-GN-16
200-BK
136-GN
441-OR
405-GY
432-PK
442-GY
1
417-GY
308-YL
403-GN
200-BK
727-GN
326-RD
132-6640
201-BK
B
2
12
447-PK
614-PU-16
X
FF
201-BK
630-GY-16
6
5
630-GY-16
200-BK
163-1662
3
11
441-OR
6
443-YL
7
1
442-GY
2
FF
201-BK
614-PU-16
1
4
921-WH
755-OR
443-YL
443-YL
2
101-RD-4
201-BK
A
2
201-BK
3
5
308-YL
6
SECONDARY STEERING
CONTROL
752-YL
751-GN
BATTERY
8
F
X
X X
200-BK-16
5F
200-BK
727-GN
9
10
4
200-BK
202-BK
G762-BR
G763-PU
115-RD-14
G768-GN
J
G760-WH
200-BK
322-GY-16
G750-BU
SEC STEER MOTOR
178-0208
RD-0
EE
EE
2
SEC STEER RELAY
3E-0154
DD
20
MOTOR
G761-YL
RD-0
DD
201-BK
1
322-GY-16
201-BK
201-BK
945-BR
426-BR
02
C436-BU
324-BU
ALTERNATOR
165-YL
136-GN
484-YL
727-GN
453-PK
308-YL
BK
RD
BU
GN
PK
WH
PU
BU
YL
BK
RD
SEC STEER
SEC STER (ATTCH)01180-3842J
SEC STER GND (ATTCH)
SEC STER MOT (ATTCH)
SEC STER RLY (ATTCH)
00
324-BU
00
00
200-BK
201-BK
140-8863
183-9267
183-9266
FF
L1
ACCUMULATOR
CHARGE PRESS
SW
3E-7806
201-BK
C
200-BK-16
ST
EE
B
D-6G
G
4
A
THIS SCHEMATIC IS FOR THE 515 AND 525 CABLE SKIDDERS
AND XSMN SHIFTER IN NEUTRAL WITH BRAKE
ACCUMULATOR DISCHARGED
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF,
F-2
F-2
F-1
F-200
R
P
N
CABLE AS.
124-4776
C-2
C-2
C
A-2
S
M
L
A
K
WIRE AS.
C
D-5F
D-9E
A-2D
C-4C
B-2B
B-3A
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 18 GAUGE (AWG)
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
A
A
BLUE
GREEN
BU
GN
RD
WH
OR
YL
PK
BK
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
PU
GY
HARNESS AS.
LOCPART NO.IDENT
921-WH
3
755-OR
752-YL
751-GN
900-PU
2
901-WH
200-BK
103-YL
900-PU
754-BU
1
F
XMSN PRESS
FILTER SW
117-7773
L6
L6
B
426-BR
201-BK BK
BK
200-BK-16
3
2
OPERATOR STATION
944-OR
105-RD
TO
SEAT
A
A
607-PK-16
608-GN-16
200-BK-14
200-BK-14
108-BU-14
PLATFORM
GND
200-BK-16
1
BACKUP
ALARM
123-6449
OPERATOR STATION
BK-00
2
127-OR
108-BU-14
E708-PK
273-BK
290-BK
275-BK
291-BK
274-BK
E707-GN
270-BK
SEAT
271-BK
C414-BU
272-BK
201-BK
201-BK
201-BK-16
201-BK
108-BU-14
201-BK
201-BK
921-WH
RD-00
921-WH
752-YL
921-WH
NEG POS
324-BU
411-PK
410-WH
108-BU-14
201-BK
2
1
442-GY
443-YL
441-OR
447-PK
432-PK
405-GY
NOTE
202-BK
G763-PU
G750-BU
G755-GY
G768-GN
G760-WH
G761-YL
G762-BR
322-GY
G763-PU
308-YL
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
321-BR
C
BACK UP ALARM
A
630-GY
+24 V 126-PK
115-RD-14
321-BR
607-PK-16
PRIM PRES SW
900-PU
921-WH
901-WH
306-GN
308-YL
607-PK-16
DIFF
LOCK
SOLENOID
152-8385
40
901-WH
SEC STER RELAY
200-BK-16
UNUSED
23
UNUSED
306-GN
307-OR
G763-PU
112-PU-10
BK
WH
WH
WH
BK
GN-16
GN-16
GN-16
754-BU
CST SOLENOID
VALVES
186-1526
921-WH
SOL 1
FWD HIGH
201-BK-16
L
GN-16
GN-16
GN-16
GN-16
SOL 2
REV
SOL 3
FWD LOW
GN-16
1
8
GN-16
GN-16
GN-16
GN-16
WH
BK
BK
WH
GN
GN
R
G
BK
L22
L22
L22
L21
L21
L21
L21
4
N
B
L21
L20
L20
L20
L19
L19
L19
L18
L18
L18
L17
L17
BK
L17
L16
L16
L16
L16 L16
L16
L15
L15
L14 L14
L14
L14 L14
L13
L13
L13
L12L12
L12
L12
L13
L12
L12
L12
L10
L10
L4
L4
L4
L4
L3
L3
L3
L3
L3
L2
L2
L2
L2
L2
L1
L1
L1
L1
L1
L10
L10
L11
L11
L10
L11
L11
L10
L11
L10
L10
L11
L9
L8
SWITCH AS.
145-9994
L12
L11
L11
L10
L10
L10
L9
L9
L9
STEERING WHL GP 123-7406
L9
L9
L8
L8
L8
L8
L8
7
6
L8
L15
PK
00
L15
START RLY
KEY SW
5
F
OPERATOR STATION
OPERATOR STATION
DISCONNECT SW
7N-0718
START
AID SW
3E-7176
FORWARD
HORN SW
2T-3360
KEY SW
110-7887
L8
L8
L8
L7L7
L7
L7
L7
L7
1
426-BR
L5
L5
L5
L5 L5
L5
L5
L5
L5L5
614-PU-16
UNUSED
C
21
7
UNUSED
OPERATOR SW INPUT
UNUSED
4
UNUSED
105-RD
308-YL
308-YL
27
DIFFERENTIAL LOCK
UNUSED
UNUSED
UNUSED
307-OR
BK-00
RD-00
307-OR
17
16
BK
C413-YL
ON
OFF
B
S
C
R
F
BR-16
OR-16
WH
QUAD GAUGE
166-6928
LAMP (2)
7N-5876
1
405-GY
BU
YL
3
112-PU-10
GN
OR
BK
NEG POS
FRONT
FLOOD
LAMP
164-5499
G
REAR
FLOOD
LAMP
164-5499
1
CAT DATA LINK-
324-BU
165-YL
WH
921-WH
614-PU-14
00
00
498-WH
01
426-BR
G762-BR-16
411-PK
410-WH
201-BK
103-YL
403-GN
274-BK
273-BK
272-BK
271-BK
270-BK
202-BK-16
178-7497
115-RD-14
REAR/CENTER
LAMP SW
123-5865
201-BK
8
9
28
2
SOL 4
10
36
1
29
SERVICE
TOOL
CONNECTOR
321-BR
126-3619
200-BK-16
C
426-BR
5
20
426-BR
19
NEUTRAL
(132-6335 CHG 03)
G755-GY
114-RD
200-BK-16
311-WH
310-PU
PU-16
RD-00
N
24
B
18
11
TO
ENGINE
BLOCK
M
614-PU-16
38
34
35
14
23
6
16
22
12
3
YL-16
STARTER
106-8555
COOLANT
SENDER
7N-8532
SOL 6
1
2
SOL 5
2
1
CST SOLENOID
VALVES
186-1526
L6
32
40
31
37
30
10A
105-RD
1
HARNESS CODE 4
HARNESS CODE 3
HARNESS CODE 2
HARNESS CODE 1
103-YL
HARNESS CODE 0
2
25
441-OR
T
01
T
311-WH
MODULE CLOCK
202-BK
CLUSTER +V
L6
19
CAT DATA LINK +
498-WH
CAT DATA LINK -
HYD TEMP SENSOR
CNVT TEMP SENSOR
ACTION LAMP
FUEL LEVEL SENDER
B
COOL TEMP SENSOR
BRK OIL PRESS
ENG OIL PRESS
ACTION ALARM
2
GROUND
DATA
HARNESS CODE 5
ALTERNATOR
XSMN FILTER BYPASS
+ BATTERY
SERVICE
CLEAR
MODULE LOAD
MODULE DATA
UNUSED
HARNESS CODE
MODULE LOAD
CLOCK
+V DISPLAY
1
2
1
2
13
18
419-YL
TO
ENGINE
BLOCK
BK-00
STRAP AS. 8X-6645
FRONT
FLOOD
LAMP
164-5499
304-WH-8
GROUND
START AID
SOLENOID
3E-6332
1
C413-YL
C414-BU
11
E707-GN
D
D
KK
D
D
D
D
D
D
D
D
D
G
G
D
D
D
FRONT LAMP
SW
100-4423
D
D
G
D
FORWARD
HORN
163-1201
322-GY
630-GY-16
2
1
F
B
A
3
D
178-7500
498-WH
E708-PK
2
01
D
K
C
10A
109-RD-4
109-RD-4
306-GN
BK-16 308-YL
BK-16
921-WH
10A
10A
124-GN-14
115-RD-14
ELEC XSMN
DIFF LOCK10A
10A
10A
15A
12
G S
MTR BAT
MOTOR
103-YL
136-GN
D
127-OR
UNUSED
UNUSED
17
15
200-BK
109-RD-4
CATERPILLAR MONITORING SYSTEM
175-0027
02
33
13
26
4
2
39
27
17
15
ACTION
ALARM
3E-6328
F
F
275-BK
BK-16
RD-16
DD
HYDRAULIC
SENDER
4W-9972
608-GN-16
630-GY-16
1
200-BK-16
101-RD-4
DOWNSHIFT (N/O)
DOWNSHIFT (N/C)
630-GY-16
UPSHIFT (N/O)
F
UPSHIFT (N/C)
310-PU
D
L6
C
REVERSE SW
A
FORWARD SW
200-BK-16
200-BK-16
498-WH
921-WH
201-BK
GROUND
NEUTRAL SW
B
498-WH
944-OR
201-BK-16
200-BK-4
ALTERNATOR
114-2401
304-WH-8
ATCH LAMPS
BLOWER MOTOR
POWER DISTRIBUTION BOX
POWER DISTRIBUTION BOX
432-PK
FORWARD HORN
GRAPPLE DISABLE
1
KEY
304-WH-8
308-YL
306-GN
B+
200-BK-16
614-PU-16
403-GN
122-4248
BK
109-RD-8
614-PU-16
BK
200-BK
CONVERTER
SENDER
7N-8532
109-RD-4
STD LAMPS
101-RD-12
MAIN RELAY
167-0138
754-BU
START RELAY
125-1302
608-GN-16
FUSE
9W-1442 10AMP
9W-1441 15AMP
FUSE
HOLDER
9W-2035
109-RD-4
80A
15A
10A
FRAME GROUND
607-PK-16
BK
BU
RD
945-BR
CHG
200-BK-16
200-BK-16
201-BK
177-7555
177-4742
200-BK-16
COOLANT SW
3E-6425
614-PU
202-BK
200-BK
114-RD
TO
FRAME
BK-16
B
E
E
10A
MUR440
105-RD
R
C
T
D
10A
101-RD-4
MAIN BREAKER
9S-4693
CIRCUIT
BREAKER
3T-2662
1
PANEL LAMPS/ GAUGES
165-YL
126-PK
101-RD-14
T
CONN 1
CONN 2
CONN 3
CONN 4
CONN 5
CONN 6
CONN 7
CONN 8
CONN 9
CONN 10
CONN 11
CONN 12
A
E
F
D
C
B
A
E
F
D
C
B
9 8 7
6
5 4
3 2
1
9 8 7
6
5 4
3 2
1
STARTING CIRCUIT.
VIMS CMS EMS CIRCUIT.
PANEL LAMP CIRCUIT.
GROUND CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE SYSTEM VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE SYSTEM VOLTAGE
WHEN THE KEY SWITCH IS ON.
SYMBOL DESCRIPTION
BLADE, SPADE, RING OR SCREW
TERMINAL
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ELECTRICAL CONNECTION TO
MACHINE STRUCTURE
INTERNAL ELECTRICAL CONNECTION
TO SURFACE OF COMPONENT
CONNECTOR
ATCH WIRE, CABLE, COMPONENT
CIRCUIT CONNECTED
SPLICE
CIRCUIT GROUPING DESIGNATION
H#
