963C TRACK LOADER (2DS1-UP) ELECTRICAL SYSTEM SCHEMATIC

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.
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
Connector Location¹
Connector Number
Schematic
Location
Machine
Location
CONN 1 C-8 1
CONN 2 C-7 19
CONN 3 C-7 19
CONN 4 C-7 19
CONN 5 C-7 19
CONN 6 C-7 19
CONN 7 B-6 E
CONN 8 B-6 E
CONN 9 C-5 16
CONN 10 B-5 9
CONN 11 Harness Code A-5 E
CONN 12 Service Tool A-5 E
CONN 13 B-4 8
CONN 14 D-4 27
CONN 15 D-3 31
CONN 16 Caterpillar Monitoring
System Harness Code
C-2 A
CONN 17 C-1 30
¹The connectors shown in this chart are harness to harness and
special use connectors. Connectors which join a harness to a
component are generally located at on near the component. See the
component location chart.
Title Form Number
Alternator: (132-2156) SENR4757
Caterpillar Monitoring System RENR2014
Electronic Hydrostatic Control SENR8314
Starter Motor: (104-7040)
Consist: 6V-5720 SENR3581
Consist: 106-8557 SENR3859
Component Identifiers (CID¹ ) and Module
Identifiers (MID²)
CID No. Component
Caterpillar Monitoring System (MID No. 30)
0096 Fuel Level Sender
0110 Engine Coolant Temperature Sensor
0177 Torque Converter Oil Temperature Sensor
0248 Data Link
0263 8 Volt Sensor Power Supply
0271 Action Alarm
0324 Action Lamp
0600 Hydraulic Oil Temperature Sensor
0601 Brake Air Pressure
0819 Display Data Link
0821 9 Volt Display Power Supply
0830 Brake Oil Temperature
Electronic Hydrostatic Control (MID No. 79)
0070 Parking Brake Switch
0110 Engine Coolant Temperature Sensor
0168 Electrical System Voltage
0190 Engine RPM Sensor
0269 Sensor Supply Voltage
0296 Hydrostatic Transmission Electronic Control Module
0299 Transmission Lever Position Sensor
0349 Transmission Sync Solenoid
0358 Pilot Pressure Supply Actuator
0463 Implement Dual Pressure Relief Solenoid
0464 Implement Tilt Lever Position Switch
0465 Governor Control Lever Switch
0466 Left Track Steering Pedal Position Sensor
0467 Right Track Steering Pedal Position Sensor
0468 Service Brake Pedal Position Switch
0469 Left Track Forward Direction Solenoid
0470 Left Track Reverse Direction Solenoid
0471 Right Track Forward Direction Solenoid
0472 Right Track Reverse Direction Solenoid
0473 Charge Pressure Sensor
0589 Travel Speed Switch
0617 Air Inlet Heater Relay
0650 Harness Code
0681 Parking Brake Solenoid
The CID is a diagnostic code that indicates which component is faulty.
The MID is a diagnostic code that indicates which electronic control
module diagnosed the fault.
Monitoring System Mode
Mode of Operation Mode Number
Normal 0
Harness Code 1
Parameter Display 2
Service 3
Digital Tattletale 4
Electronic Hydrostatic Control 5
Machine Code
Sales Model Machine Code
963C 010
Failure Mode Identifiers (FMI)
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.
The FMI is a diagnostic code that indicates what type of failure has
occurred.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Action D-4 A Sender - Fuel Level D-1 13
Alarm - Backup C-8 1 Sender - Trans Oil Temp B-7 14
Alternator D-8 2 Sensor - Bucket Positioner C-1 27
Battery A-8 32 Sensor - Center Pedal B-2 15
Battery D-8 3 Sensor - Charge Pressure C-5 16
Breaker - Alt A-6 E Sensor - Coolant Temp C-8 2
Caterpillar Monitoring System A-2 A Sensor - Hydraulic Oil Temp C-1 17
Control - Electronic Hydrostatic A-5 E Sensor - Left Steering Pedal B-2 15
Control - Pilot Valve A-4 B Sensor - Lift Kickout C-1 28
Converter B-4 D Sensor - Right Steering Pedal B-2 15
Diode - Arc Suppressor B-8 4 Sensor - RPM A-6 18
Fuses A-7 E Sensor - RPM C-6 18
Gauge Cluster D-2 A Sensor - Speed/Direction D-3 19
Ground - Cab Roof C-4 D Solenoid - A/C Clutch B-8 4
Ground - Dash C-2 A Solenoid - Engine Shutdown B-8 20
Ground - Engine D-7 5 Solenoid - Left Forward C-5 16
Ground - Engine D-8 2 Solenoid - Left Rev C-5 16
Ground - Engine D-8 2 Solenoid - Override C-5 16
Ground - Front Frame D-2 6 Solenoid - Park Brake C-5 16
Ground - Left Frame C-7 3 Solenoid - Right Forward C-5 16
Ground - Left Frame A-8 3 Solenoid - Right Rev C-5 16
Ground - Platform D-2 6 Solenoid - Start Aid D-7 21
Ground - Rear Frame D-7 3 Solenoid - Sync C-5 22
Heater - Air Inlet D-7 7 Switch - A/C High/Low B-8 4
Horn - Forward D-1 6 Switch - Air Inlet Heater C-2 A
Lamp - Action B-2 A Switch - Blower B-4 B
Lighter - Cigar B-2 A Switch - Clear A-4 23
Motor - Blower B-5 8 Switch - Disconnect A-8 21
Motor - Condenser B-5 9 Switch - Engine Oil B-7 24
Motor - Front Washer D-4 10 Switch - Forward Horn C-3 C
Motor - Front Wiper D-4 11 Switch - Front Wiper C-4 25
Motor - Rear Washer D-4 10 Switch - Governor Lever C-3 C
Motor - Rear Wiper D-4 12 Switch - Key Start B-2 A
Motor - Starter D-7 5 Switch - Lamp C-2 A
Radio B-4 D Switch - Operator/Start Aid C-2 A
Relay - Air Inlet Heater D-7 7 Switch - Rear Wiper C-4 25
Relay - Main A-7 E Switch - Sensor/Speed Cal A-4 23
Relay - Start A-6 E Switch - Service A-4 23
Relay Assembly B-5 9 Switch - Start Aid Temp C-8 2
Resistor - Blower Motor B-5 8 Switch - Thermostat B-5 8
Resistor - Dimming D-2 A Switch - Trans Control Brake D-3 C
Sender - Engine Speed B-7 5 Switch - Travel C-3 A
Machine locations are repeated for components that are located close together.
A = Components located on Dash.
B = Components located on Right Console.
C = Components located on Left Console.
D = Components located in Headliner.
E = Components located on Relay/Fuse Panel.
Resistor, Sender, and Solenoid Specifications
Part No. Component Resistance (Ohms)¹
3E-6332 Solenoid - Start Aid 6
4W-9972 Sender - XMSN Oil Temperature 560 to 716 @ 54ºC (130ºF)
72 to 82 @ 110ºC (230ºF)
6V-2455 Sender - Engine Speed 110 - 200
9G-1950 Resistor - A/C Motor Overall 2.0 ± .1; Tap 1.0 ± .05
101-1759 Solenoid - A/C Clutch 14.4 ± 0.6
116-4152 Solenoid - Park Brake 34.3 ± 1.7
116-6203 Resistor - Dimming 20 ± 1
Solenoids - Left Forward
Left Reverse
130-3310 Right Forward 7.75 ± 1.00
Right Reverse
Override
130-6913 Solenoid - Sync 33.6
155-4652 Solenoid - Engine Shutdown Latch - 1.55 ± 10%
Unlatch - 10.3 ± 10%
¹ At room temperature.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6449 Start Aid Temperature 38.0 ± 3.0 ºC 27.0 º C Normally
100.4 ± 5.4ºF 80.6 ºF Closed
3E-7692 Engine Oil 113.0kPa MAX 70.0 ± 20.0kPa Normally
16.4psi MAX 10.2 ± 2.9psi Open
114-5333 Refrigerant Pressure (AC) 275 to 1750 kPa¹ -- Normally ²
40 to 255 psi -- Open
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 (25 psi).
² Contact position at the contacts of the harness connector.
Wire Description Chart
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Distribution Circuits Accessory Circuits (cont'd)
101 RD Bat (+) 506 PU Washer - Front
102 BU Hd Lmp 507 WH Washer - Rear
105 BR Key Sw 508 PU Radio Speaker - Left
109 OR Alt Output (+) Term. 509 WH Radio Speaker - Left (Common)
112 PU Main Power Rly Output 511 BR Radio Speaker - Right
113 OR Opr Mon Panel B (+) Switched 512 GN Radio Speaker - Right (Common)
114 GN Warning Horn (Forward) 513 OR A/C Compressor/Refrigerant Pressure SW
116 BR Aux Ckt 515 GY Blower Motor (HI)
118 GY Aux Ckt 516 GN Blower Motor (Medium)
124 GN A/C 517 BU Blower Motor (Low)
128 PK Aux Ckt 521 YL A/C SW To Refrigerant SW
129 BU Aux Ckt 522 WH A/C Clutch To Thermostat SW
158 BR Aux Ckt 592 BU DC/DC Converter Power Output
160 PU Aux Ckt A513 PK DC/DC Converter Memory Output
164 WH Hydro Ctrl Lighting Circuits
Ground Circuit 600 BR Dash Lamp Basic
200 BK Main Chassis 610 OR Head Lamp Basic
201 BK Operator Monitor Return 615 YL Cab Flood Lamp/Rops
202 BK XMSN Ctrl 663 GY Gauge Lamps - CAT Mon Sys
260 BK TEHC Ident Code 0 Control Circuits
261 BK TEHC Ident Code 1 761 GY Lift Kickout Sol SW
262 BK TEHC Ident Code 2 762 YL Bucket Positioner Sol SW
263 BK TEHC Ident Code 3 799 WH Sensor Power
270 BK CAT Mon Sys Ident Code 0 C744 PU Parking Brake - Sol To SW
271 BK CAT Mon Sys Ident Code 1 E707 GN Display +V
272 BK CAT Mon Sys Ident Code 2 E708 PK Display Clock
273 BK CAT Mon Sys Ident Code 3 E735 PU CAT Mon Sys Tack/Serv Mtr/Odometer Select
274 BK CAT Mon Sys Ident Code 4 F743 GY Impl Lift Prop Sol 2
275 BK CAT Mon Sys Ident Code 5 F780 PK Parking Brake SW
290 BK CAT Mon Sys Service F793 OR Air Inlet Heater Relay
291 BK CAT Mon Sys Clear F794 BU Lift SW (N.C.)
Basic Machine Circuits F795 YL Lift SW (N.O.)
301 BU Starter No. 1 Sol F796 GY Engine Speed
304 WH Starter Relay No. 1 Output 822 PK Forward Hydrst Sync Sol
306 GN Starter Relay Coil 828 WH Hydrst Left Ster Pedal Sensor
308 YL Main Power Relay Coil 829 GN Hydrst Pedal Sensor
310 PU Start Aid SW To Start Aid Sol 830 OR Hydrst Right Ster Pedal Sensor
311 WH Start Aid Sol To Temp SW 831 PK Hydrst Eng Speed Sensor
321 BR Bckp Alarm 836 WH Hydrst Throttle N/O SW
322 GY Warning Horn (Forward) 837 GN Hydrst Throttle N/C SW
326 PU Key SW "C" Term. 843 WH Hydrst Left Pump Forward Sol
Monitoring Circuits 844 GN Hydrst Left Pump Reverse Sol
403 GN Alternator (R) Term. 848 GY Hydrst Speed Reverse Sol
405 GY Opr Mon Oil Press. (Low Setting) 849 YL Hydrst Right Pump Reverse Sol
410 WH Opr Mon Action Alarm 850 PU Hydrst Right Pump Forward Sol
411 PK Opr Mon Master 851 WH Hydrst Speed And Direction Sensor
419 YL Opr Mon Parking Brake 852 GN Hydrst Charge Press. Sensor
441 OR Eng Coolant Temp Gauge 892 BR CAT Data Link (-)
442 GY Hyd System Temp Gauge 893 GN CAT Data Link (+)
443 YL Power Train Temp Gauge F842 BU AIH Post Heat
447 PK Fuel Level Gauge 975 WH Sol Return
C413 YL Display Data E900 WH Trans Output SPD (+)
C414 BU Display Load E901 GN Trans Output SPD (-)
Accessory Circuits E902 PU Trans Intermediate SPD (+)
500 BR Wiper - Front (Park) E903 YL Trans Intermediate SPD (-)
501 GN Wiper - Front (Low) G939 PK Hydro Cont Switch Return
502 OR Wiper - Front (HI) K997 BU (+) V Sensor, CAT Mon Sys
503 BR Wiper - Rear (Park) R985 WH Travel Speed SW Travel Mode
504 YL Wiper - Rear (Low) R986 BU Travel Speed SW Work Mode
505 BU Wiper - Rear (HI)
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
31
32
7
23
18
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
19
20
21
22
23
24
25
26
27
28
29
30
31
32
7
23
Machine Harness Connector And Component Locations
©
1999 Caterpillar
All Rights Reserved
Printed in U.S.A.
SENR1832
April 1999
963C Track-Type Loader
Electrical System
2DS1-UP
E86878
WH
201-BK
200-BK
200-BK-14
306-GN
F842-BU
610-OR-14
507-WH
506-PU
610-OR-14
507-WH
506-PU
410-WH
615-YL
306-GN
G939-PK
G939-PK G939-PK
200-BK-14
200-BK
200-BK
200-BK
200-BK
308-YL
308-YL
200-BK
200-BK200-BK
200-BK
308-YL
C
CAB/ROPS
FLOOD LAMP
112-9378
(RECT.)
200-BK
615-YL
W
W
V
V
S
F
D
D
D
D
D
D
A
D
A
A
A
A
A
A
B
B
A
A
AA
RD-4
AIR INLET
HEATER
107-9652
BK-2
160-PU-4
TO ENGINE
GND STRAP-4
RD-00
201-BK
200-BK-14
FRT FRAME
GND BOSS
A.I.H
RELAY
125-1302
975-WH
F793-OR
200-BK
PLATFORM
GND BOSS
200-BK-8
1
2
200-BK-14
BK
200-BK
308-YL
200-BK
Y
Y
P
P
N
N
D
1
2
615-YL
975-WH
2
POSNEG
12V BATTERY
3T-5760 STD
9X-3404 ATCH
975-WH-14
1
975-WH
321-BR
321-BR
START AID
SOLENOID
3E-6332
BK-18
311-WH
301-BU-10
310-PU
BK-18
ALTERNATOR
132-2156
403-GN
109-RD-4
FLOOD LAMP
135-5549
101-RD-4
200-BK-14
304-WH-8
610-OR-14
RD-00
MOTOR
BATMTR
SG
+
R
ALT
310-PU
102-RD-12
G939-PK
102-RD-12
G939-PK
200-BK
506-PU
507-WH
(SHOWN IN
LOCKED
POSITION)
G939-PK
419-YL
975-WH
975-WH
2
3
1
G939-PK
COM
N/O
663-GY
5
2
1
3
6
4
200-BK
114-RD
164-WH-14
113-OR
200-BK-14
DIMMING
RESISTOR
116-6203
200-BK
GAUGE CLUSTER
100-5895
201-BK
E708-PK
E707-GN
C414-BU
C413-YL
BU
BK
GN
OR
YL
HARNESS CODE
MODULE LOAD
CLOCK
+V DISPLAY
GROUND
DATA
WH
200-BK-14
200-BK
LAMP
7N-5876
200-BK
200-BK
663-GY
200-BK
975-WH
442-GY
N/C
XMSN CONTROL
BRAKE SW.
6G-4195
610-OR-14
2
1
WH
BK
200-BK-14
610-OR-14
2
1
K997-BU
105-RD
447-PK
129-RD
837-GN
2
1
BK
201-BK
FUEL
LEVEL
SENDER
118-0690
201-BK
447-PK 447-PK
200-BK
322-GY
FORWARD
HORN
7T-0969
A
B
C
+ 8V
GROUND
HYDRAULIC OIL
TEMP. SENSOR
K997-BU
201-BK
442-GY
WH
A
SIGNAL
OR-18
BK-18
WH-18
610-OR-14
164-WH
164-WH
200-BK
REAR WASHER
7T-8890
FRONT WASHER
7T-8890
MOTOR
MOTOR
RD-00
836-WH
419-YL
F780-PK
893-GN
892-BR
G939-PK
200-BK-14
F780-PK
RUN LAMP
133-6336
200-BK-14
200-BK-14
308-YL
164-WH-14
200-BK-14
200-BK-14 200-BK
615-YL
200-BK
322-GY
200-BK-14
REAR FRAME
GND BOSS
200-BK-14
200-BK
B
114-RD
114-RD
114-RD
C
A
114-RD
200-BK
PURGE FUEL PUMP
200-BK
114-RD
1
2
D
B
1
2
WH
F
BK
1
128-PK
102-RD-12
2
1
RPM
SENSOR
6V-2455
BK
WH
E901-GN
E900-WH
E902-PU
E903-YL
WH
BK
RPM
SENSOR
6V-2455
1
2
410-WH
506-PU
507-WH
F793-OR
F793-OR
306-GN
306-GN
306-GN
200-BK
200-BK
308-YL
308-YL
200-BK
200-BK
XX
R
R
Q
Q
U
U
T
T
S
F
M
L
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
C
A
A
A
A
A
A
A
A
A A
A
BK-00
301-BU-10
200-BK-10
326-PU
405-GY
201-BK
521-YL-14
522-WH
831-PK
F796-GY
443-YL
615-YL
615-YL
8
7
507-WH
129-RD
105-RD
102-RD-12
114-RD
5
113-OR
113-OR
2
1
3
109-RD-4
304-WH-8
101-RD-4
118-GY-14
116-BR-14
158-BR-14
124-GN-14
506-PU
113-OR
6
4
12V BATTERY
3T-5760 STD
9X-3404 ATCH
615-YL
410-WH
522-WH
A
Z
SUPRESSOR
ARC DIODE
106-8704
2
522-WH-14
513-OR-14
MOTOR
12
11
10
9
200-BK-14
610-OR-14
610-OR-14
200-BK-14
RD-00
114-RD
1
2
TO ENGINE
RD-00
B
975-WH
F793-OR
6
5
4
3
2
1
522-WH
F796-GY
443-YL
2
1
1
2
2
M
1
610-OR-14
A
FLOOD LAMP
135-5549
80A
ALT
BREAKER
9S-4693
RD-00
200-BK-14
B
831-PK
2
1
G939-PK
405-GY
311-WH
200-BK
T
326-PU
200-BK-14
799-WH
403-GN
441-OR
A/C CLUTCH COIL ASSY
101-1759
A/C HI-LO SW
114-5333
NOTE B
513-OR-14
3
2
1
2
1
405-GY
201-BK
975-WH
610-OR-14
ENGINE
OIL SW
3E-7692
BK-18
BK-18
2
1
443-YL
XMSN OIL
TEMP SENDER
4W-9972
STARTER
104-7040
TO
ENGINE
200-BK-4
DISCONNECT
SW
7N-0718
BK-00
200-BK-10
BK-00
FUSE 10A : 3K-8782
FUSE 15A : 8N-8948
FUSE 20A : 8N-0456
BACKUP
ALARM
123-6449
BK
BK
7
START AID
TEMP. SW.
3E-6449
201-BK
799-WH
G939-PK
521-YL-14
NEGPOS
321-BR
200-BK
LEFT FRAME
GROUND BOSS
ENGINE
SHUTDOWN
SOLENOID
155-4652
301-BU-10
200-BK-10
326-PU
441-OR
8
ENGINE
SPEED
SENDER
6V-2455
BK
WH
F796-GY
521-YL-14
522-WH-14
B
COOLANT TEMP. SENSOR
152-0649
310-PU
831-PK
109-RD-4
A
B
LEFT FRANE
GROUND BOSS
C
+8V
GROUND
T
SIGNAL
OR-18
BK-18
200-BK
200-BK
308-YL
WH-18
522-WH
102-RD-12
521-YL-14
109-RD-4
304-WH-8
101-RD-4
128-PK
128-PK
410-WH
521-YL-14
410-WH
158-BR-14
118-GY-14
102-RD
4
6
3
1
2
5
507-WH
506-PU
7
8
116-BR-14
200-BK-14
A
1
2
200-BK-14
102-RD-12
102-RD-12
B
200-BK-14
521-YL-14
124-GN-14
112-PU-14
KICKOUT
10A
A
112-PU-14
101-RD-4
112-PU-14
112-PU-14
112-PU-14
101-RD-14
1
2
101-RD-14
112-PU-14
2
1
101-RD-12
101-RD-14
112-PU-14
RELAY/FUSE PANEL
113-OR
164-WH-14
116-BR-14
129-RD
10A
15A
10A
10A
10A
20A
10A
304-WH-8
WIPERS/RADIO
200-BK
306-GN
109-RD-4
109-RD-4
109-RD
118-GY-14
124-GN-1420A
FANS
A/C
200-BK
LIGHTS
158-BR-14
STRAP
117-7030
308-YL
SYSTEM MONITORING
FRONT HORN
102-RD-12
KEY FUSE
TEHC
105-RD
START
RELAY
125-1302
114-RD
MAIN
RELAY
167-0138
113-OR
AUXILIARY
CIGAR LIGHTER
20A
164-WH-14
10A
CONN 1
CONN 2
CONN 3
CONN 4
CONN 5
CONN 6
CONN 8
CONN 7
B
WP
L
H
B
503-BR
C
C
C
506-PU
200-BK
118-GY
118-GY
500-BR
501-GN
1
2
3
4
5
6
7
8
B+
B+
BU-14
YL-14
WH-14
BN-18
RD-18
RD-14
BK-18 GND
HIGH SPEED
WASHER PUMP
761-GY
128-PK
762-YL
F794-BU
762-YL
128-PK
761-GY
F795-YL
G939-PK
A
B
4
5
3
2
1
6
E903-YL
E902-PU
E901-GN
7
6
1
2
3
RD
BK201-BK
410-WH
1
2
128-PK
E900-WH
975-WH-14
E902-PU
128-PK
410-WH
447-PK
K997-BU
442-GY
200-BK-14
610-OR-14
5
C
C
C
C
C
C
C
C
4
B
A
E
E
E
E
E
E
E
E
E
A
310-PU
200-BK
F743-GY
321-BR
8
9
ACTION
ALARM
3E-6328
200-BK
200-BK-10
C
A
200-BK
DOME
LAMP
3E-6389
BK
WH
RD
102-RD
B
200-BK-14
200-BK
E902-PU
200-BK
615-YL
200-BK
508-PU
509-WH
LEFT
SPEAKER
6T-7695
502-OR
BK
118-GY
118-GY
2
1
502-OR
500-BR
118-GY
501-GN
REAR
WIPER
9X-5601
505-BU
FRONT
WIPER SW
3E-0155
REAR
WIPER SW
119-4436
118-GY-14
GN
GY
BR
OR
4
2
3
1
L
MOTOR
118-GY
118-GY
503-BR
118-GY
504-YL
T
GN
GY
BR
OR
3
E903-YL
5
E901-GN
E900-WH
PARK
200-BK
6
4
H
L
410-WH
102-RD
118-GY-14
507-WH
506-PU
410-WH
852-GN
848-GY
822-PK
1
2
C744-PU
MOTOR
T
200-BK
10
12
11
E900-WH
E901-GN
FRONT
WIPER
146-6149
E903-YL
843-WH
118-GY
200-BK
610-OR-14
200-BK-14
CAB ROOF
GND BOSS
610-OR-14
310-PU
8
1
2
7
6
5
4
3
9
E903-YL
118-GY
844-GN
610-OR-14
E902-PU
975-WH
321-BR
K997-BU
447-PK
442-GY
849-YL
C744-PU
610-OR-14
11
12
850-PU
CHARGE
PRESSURE
SENSOR
147-7318
PARK BRAKE
SOLENOID
116-4152
975-WH
RIGHT REV
SOLENOID
130-3310
RIGHT FWD
SOLENOID
130-3310
SYNC
SOLENOID
130-6913
OVERRIDE
SOLENOID
130-3310
LEFT REV
SOLENOID
130-3310
LEFT FWD
SOLENOID
130-3310
C744-PU 2
1
2
1
849-YL
2
1
975-WH-14
852-GN
164-WH
G939-PK
844-GN
843-WH
822-PK
848-GY
850-PU
849-YL
850-PU
975-WH
1
2
975-WH
844-GN
975-WH
843-WH
975-WH
164-WH
852-GN
G939-PK
10
848-GY
975-WH 2
1
1
2
975-WH
822-PK
A
B
C
+ V
GROUND
SIGNAL
YL-18
LOW SPEED
OR-18
GN-18
CONN 9
CONN 14
CONN 15
G939-PK
761-GY
LIFT KICKOUT
8C-9763
AA
1
2
3
GROUND
+ V
128-PK
615-YL
306-GN
442-GY
K997-BU
447-PK
410-WH
447-PK
K997-BU
442-GY
410-WH
A A
A
A
A
A
A
A
A
A
A
A
128-PK
828-WH
829-GN
830-OR
128-PK
615-YL
129-RD
105-RD
761-GY
308-YL
200-BK
762-YL
G939-PK
SOL.
BK-18
OR-18
BU-18
BK-18
BU-18
OR-18
GROUND
200-BK
762-YL
200-BK
BUCKET POSITIONNER
8C-9759
SOL.
+ V
3
2
1
AA
164-WH
202-BK-14
201-BK-14
J
G939-PK
G939-PK
R985-WH
G939-PK
R986-BU
1
A
A
3
2
B
B
TRAVEL SW
155-2719
B
AA
164-WH-14
G939-PK
113-OR
G939-PK
G939-PK
N/C
N/O
COM
G939-PK
(SHOWN IN HIGH
IDLE POSITION)
GOVERNOR
LEVER
SWITCH
6G-4195
164-WH
G939-PK
851-WH
837-GN
836-WH
SPEED/DIRECTION
SENSOR
147-1680
322-GY
114-RD
FORWARD HORN SW.
3T-2357
A
B
C
+ V
GROUND
SIGNAL
RD-18
BK-18
WH-18
851-WH
830-OR
829-GN
828-WH
164-WH-14
201-BK
200-BK-8
200-BK
200-BK
1
200-BK
164-WH
164-WH
164-WH
600-BR
200-BK
201-BK
201-BK
600-BR
201-BK
A.I.H.
SWITCH
112-6169
A
B
2
3
102-RD-12
600-BR
F842-BU
200-BK
200-BK
200-BK
F842-BU
600-BR
2
200-BK
G939-PK
G939-PK
DASH GND BOSS
610-OR-14
G939-PK
G939-PK
600-BR
200-BK
600-BR
6
4
3
1
5
2
B
A
600-BR
E735-PU
201-BK
6
4
3
1
5
2
D
C
B
LAMP SW
3E-2210
A
102-RD-12
OPERATOR SW./
START AID SW.
123-6361
600-BR
308-YL
200-BK
310-PU
E735-PU
G939-PK
610-OR-14
4
310-PU
3
2
1
152-0649
G939-PK
615-YL
201-BK
201-BK
200-BK
164-WH
G939-PK-14
4
6
8
3
1
2
7
5
308-YL
HARNESS CODE
SYSTEM
MONITORING
CATERPILLAR
CONNECTOR
138-8581
275-BK
274-BK
273-BK
272-BK
271-BK
270-BK
201-BK
CONN 16
CONN 17
NOTE D: 24 TO 12 VOLT CONVERTER NOT REQUIRED
NOTE C: THE FOLLOWING ARE COMMUNICATED VIA DATA LINK
NOTE B: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
A
8
7
K997-BU
36
NOTE A: THE FOLLOWING WIRE PAIRS MUST BE TWISTED AT
21
CAT DATA LINK +
CAT DATA LINK -
E735-PU OPERATOR SW INPUT
168-8769
NOTE A
892-BR
893-GN
411-PK
410-WH
113-OR
403-GN
+8V SENSOR SUPPLY
290-BK
291-BK
270-BK
271-BK
272-BK
273-BK
XMSN OIL TEMP.
274-BK
275-BK
FUEL LEVEL SENDER
ALTERNATOR
+ BATTERY
GROUND
ACTION LAMP
ACTION ALARM
CLUSTER +V
MODULE LOAD
13
1
39
4
29
28
40
32
20
24
9
10
19
25
34
15
35
443-YL
E708-PK
E707-GN
C414-BU
C413-YL
MODULE CLOCK
447-PK
442-GY HYD OIL TEMP.
405-GY ENG. OIL PRESS. SW.
30
27
201-BK
11
38
37
26
5
14
2
23 SERVICE
CLEAR
HARNESS CODE 1
HARNESS CODE 2
HARNESS CODE 031
HARNESS CODE 3
HARNESS CODE 4
HARNESS CODE 5
MODULE DATA
33
18
3
12
22
16
17
6
NOTE F: PILOT VALVE OPTIONS
NOTE E: ACTIVATED IN THE BUCKET RACKBACK POSITION
WITH 24 VOLT RADIO
RADIO OPTIONS
12 VOLT RADIOS
3E-7140 FIXED U.S.
3E-7141 REMOVABLE U.S.
3E-6107 FIXED EUROPE
3E-6106 REMOVABLE EUROPE
24 VOLT RADIOS
9X-6779 FIXED U.S.
9X-6778 REMOVABLE U.S.
3E-7890 FIXED EUROPE
9X-5288 REMOVABLE EUROPE
(ENGINE SPEED, SERVICE CODES)
LEAST 1 TURN/25 MILLIMETERS (892-BR/893-GN)
(831-PK/F796-GY),(E900-WH/E901-GN),
(E902-PU/E903-YL)
127-0860 2 LEVERS-2 WAYS
127-0861 3 LEVERS-3 WAYS
127-0862 JOYSTICK-2 WAYS
127-0863 JOYSTICK-3 WAYS
CATERPILLAR MONITORING SYSTEM
200-BK-14200-BK-14
610-OR-14 610-OR-14
R985 WH
442-GY
K997-BU
447-PK
410-WH
A
A
306-GN
E735-PU
290-BK
291-BK
R986-BU
R985-WH
R986-BU
893-GN
892-BR
113-OR
105-RD
443-YL
405-GY
403-GN
A
326-PU
RIGHT STEERING
PEDAL SENSOR
147-1680
LEFT STEERING
PEDAL SENSOR
147-1680
CENTER PEDAL
SENSOR
147-1680
829-GN
828-WH
G939-PK
G939-PK
830-OR
164-WH
164-WH
164-WH
G939-PK
A
B
C
GROUND
+V
SIGNAL
RD-18
BK-18
WH-18
A
B
C
GROUND
+V
SIGNAL
RD-18
BK-18
WH-18
A
B
C
GROUND
+V
SIGNAL
RD-18
BK-18
WH-18
200-BK
615-YL
A
A
A
E735-PU
E735-PU
308-YL
200-BK
129-RD
CIGAR LIGHTER
9W-0335
BASE
3T-0304
ACTION LAMP
7N-1996
411-PK
201-BK
KEY
START
SWITCH
9G-7641
105-RD
326-PU
306-GN
R
C
S
B
OFF
ON
ST
128-PK
F793-OR
128-PK
610-OR-14
H
H
H
CONDENSER
103-9527
C
610-OR-14
975-WH-14
E902-PU
MOTOR
106-2721
202-BK-14
201-BK-14
200-BK-14
201-BK-14
1
2
522-WH
2
1
2
1
124-GN-14
G
1
2
200-BK-14
521-YL-14
BK-14
BK-14
WH/RD-14
WH/RD-14
3E6387
3E6386
OPERATOR STATION
200-BK-14
521-YL-14
158-BR-14
106-2721
MOTOR
RESISTOR
9G-1950
THERMOSTAT
3E-5464
MOTOR
RELAY AS.
3E-5239
T
MOTOR
E903-YL
200-BK-14
615-YL
B
A
C
200-BK-14
CONN 10
H
A
6
4
3
5
1
2
517-BU-14
516-GN-14
515-GY-14
200-BK-14
522-WH-14
H
CONN 13
ANTENNA
RIGHT SPKR
GROUND
LEFT SPKR
12V MEMORY
RIGHT SPKR
12V INPUT
LEFT SPKR
12V RADIO
EUROPE-3E6106
U.S-3E7141
NOTE D
C
A513-PK
118-GY
511-BR
512-GN
508-PU
509-WH
200-BK
592-BU
GN
GY
PU
BU
PK
BK
RD
4
2
1
3
5
6
7
8
C
CONVERTER 12/24V
150-3212
A513-PK
200-BK
200-BK
118-GY
102-RD
592-BU
C
RIGHT
SPEAKER
6T-7695
512-GN
511-BR
4
6
3
1
2
5
GROUND
12V OUTPUT
12V MEMORY
GND INPUT
24V IMPUT
24V MEMORY
200-BK
762-YL
200-BK-14
200-BK
A
A
A
A
A
A
761-GY
200-BK
128-PK
A
3
4
2
6
1
5
F794-BU
F795-YL
200-BK
200-BK
200-BK
762-YL
761-GY
E735-PU
SERVICE SW.
9D-3721
CLEAR SW.
9D-3721
128-PK
2 3
201-BK
201-BK
RADIO
ANTENNA
149-1928
A/C
BLOWER
SWITCH
6P-3236
515-GY-14
516-GN-14
517-BU-14
521-YL-14
124-GN-14
3
4
5
2
1
BUCKET
SOL.
LIFT
SOL.
A
PILOT VALVE CONTROL
NOTE F
BUCKET
FLOAT
SOL.
E735-PU
291-BK
290-BK
1
291-BK
2
3
SENSOR/SPEED
CAL SW
9G-0011
201-BK
201-BK
32
291-BK
E903-YL
E902-PU
E900-WH
E901-GN
A
A
A
A
SERVICE TOOL
CONNECTOR
8T-8736
H
G
F
C
D
E
A
B
113-OR
892-BR
893-GN
201-BK
BD
3E6287
(HARN.CONN.)
R985-WH
R986-BU
K
STRAP
7X-6315
101-0205
(HARN.CONN.)
UNUSED
G939-PK5
6
3
19
24
38
29
4
14
15
31
18
35
8
7
27
40
37
26
2
HARNESS
CODE
138-8582
F794-BU
F795-YL
C744-PU
10
30
13
F743-GY
UNUSED
5
UNUSED
UNUSED
BRAKE VALVE SOL.
SPEED/DIRECT. SNSR
17
39
16
9
36
23
22
34
11
UNUSED
UNUSED
17
1
843-WH
850-PU
AIH SW. (N/O)
WORKING SPEED
LEFT TRACK SPD -
UNUSED
TRAVEL SPEED
UNUSED
UNUSED
LEFT PEDAL SENSOR
UNUSED
GOVERNOR SW. (N/O)
UNUSED6
CHARGE PRESS. SNSR
2 LEVEL LIFT SOL.
UNUSED
OVERRIDE SOL.
UNUSED
RIGHT PEDAL SENSOR
CENTER PEDAL SENSOR
UNUSED
BACKUP ALARM
UNUSED
UNUSED
263-BK
262-BK
261-BK
260-BK
G939-PK-14
836-WH
837-GN
975-WH-14
844-GN
849-YL
202-BK-14
164-WH-14
892-BR
893-GN
SYNCH. SOL.
UNUSED32
UNUSED21
12
25
28
20
33
UNUSED 40
39
32
UNUSED
822-PK
828-WH
829-GN
830-OR
851-WH
852-GN
COOLANT TEMP.SENSOR
UNUSED
4
3
2
1
28
26
LEFT TRACK SPD +
IDENT. CODE 0
IDENT. CODE 3
UNUSED
27
UNUSED
UNUSED
IDENT. CODE 1
GOVERNOR SW. (N/C)
UNUSED
12
IDENT. CODE 2
UNUSED
2 LEV.LIFT SW.(N/O)
160-1758
NOTE A
RIGHT FORWARD SOL.
UNUSED
SWITCH RETURN
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
2 LEV.LIFT SW.(N/C)
1
UNUSED
UNUSED
11
33
22
23
34
24
16
6
RIGHT TRACK SPD +
UNUSED
AIH RELAY
ENGINE SPEED +
UNUSED
13
30
10
14
25
21
UNUSED
RIGHT REVERSE SOL.
LEFT FORWARD SOL.
37
36
31
19
7
DATA LINK -
DATA LINK +
UNUSED
SOLENOID RETURN
PARK.BRAKE SW.(N/O)
PARK.BRAKE SW.(N/C)
8
2
38
18
5
15
35
4
GROUND
+ BATTERY
LEFT REVERSE SOL.
29
RIGHT TRACK SPD -
3
419-YL
F780-PK
441-OR
799-WH
9
ENGINE SPEED -
20
+8V SENSOR SUPPLY
F793-OR
F842-BU
F796-GY
831-PK
321-BR
848-GY
ELECTRONIC HYDROSTATIC CONTROL
(EHC)
CONN 11
CONN 12
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
TO MACHINE STRUCTURE
120-6564
T
S
117-7030
8X-5804
R
Q
STRAP
4E-1716
P
7P-6682
124-0376
8Y-9216
3W-3362
N
M
L
CABLE AS.
138-8582
138-8581
117-7032
117-7031
K
J
H
G
WIRE AS.
ATCH137-8486
HARNESS AS.
8Y-9603
F
135-7619
133-2921
138-8627
132-4594
E
D
C
B
168-6252
108-5747Y
X
W
V
U
115-1834
115-1833
123-8329
ATCH-01126-2336Z
AA 139-1059 -01
-00
-00
-01
-01
-00
-02
-01
-01
-01
-03
-00
-01
-01
-00
-01
-04
-01
-01
-02
-01
A
-00
-01
-01
CHGIDENT PART NO. NOTE
ATCH
E86538
BK
WH
1
2
615-YL
200-BK
CAB/ROPS
FLOOD LAMP
112-9378
(RECT.)
C
2
1
BK
WH
A
610-OR-14
200-BK-14
RUN LAMP
133-6336
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 18 GAUGE
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
AND XMSN SHIFTER IN NEUTRAL
THIS SCHEMATIC IS FOR THE 963C (127-1750)
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
D
C
B
A A
B
C
D
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
CATERPILLAR MONITORING SYSTEM
CIRCUIT.
PANEL LAMP CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
START AID/AIH CIRCUIT.
ENGINE HYDROSTATIC CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.