CHALLENGER 65C & 70C AGRICULTURAL TRACTORS ELECTRICAL SYSTEM CHALLENGER

SENR5313
August 1993
Challenger 65C & 70C
Electrical System
Agricultural Tractors
65C:
2ZJ500-UP
70C:
2YL1-UP
1993 Caterpillar
All Rights Reserved
Printed in U.S.A.
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
101 RD BAT 500 BR WIPER - FRONT (PARK)
102 BU HD LMP 501 GN WIPER - FRONT (LO)
104 YL AUX CKT 502 OR WIPER - FRONT (HI)
105 BR KEY SW 503 BR WIPER - REAR (PARK)
106 WH AUX CKT 504 YL WIPER - REAR (LO)
107 WH ENG SHUTDOWN 508 PU RADIO SPEAKER - LEFT
109 OR ALT OUTPUT (+) TERM. 509 WH RADIO SPEAKER - LEFT (COMMON)
112 PU MAIN POWER RELAY OUTPUT 511 BR RADIO SPEAKER - RIGHT
115 PK AUX CKT 512 GN RADIO SPEAKER - RIGHT (COMMON)
116 BR AUX CKT 513 OR
A/C COMPRESSOR/REFRIGERANT
PRESS. SW
118 GY AUX CKT 515 GY BLOWER MOTOR (HI)
119 PK AUX CKT 516 GN BLOWER MOTOR (MEDIUM)
123 WH AUX CKT 518 OR HAZARD FLASHER TO SW
124 GN A/C 521 YL A/C SW TO REFRIGERANT SW
130 GN AUX CKT 522 WH A/C CLUTCH TO THERMOSTAT SW
135 BU AUX CKT 539 BU TURN SIGNAL INDICATOR BASIC/RIGHT
150 OR EUI (ADEM) 540 WH TURN SIGNAL INDICATOR LEFT
153 WH 3 PT HITCH CONT 557 YL
TRAILER CONNECTOR
(LEFT TURN/HAZARD)
165 YL AUX CKT 558 GN
TRAILER CONNECTOR
(RIGHT TURN/HAZARD)
167 OR AUX CKT 568 GN ALERT BUZZER TO DIODES
169 PK AUX CKT 594 PU
FRONT WIPER SW (B) TO HI SPD RELAY
COIL (85)
170 YL AUX CKT 595 YL
FRNT WPR SW(C) TO HI SPD RELAY(30) & LO
SPD(85)
172 GN AUX CKT 596 WH
FRNT WPR HI SPD RELAY(87) TO LO SPD
RELAY(87)
175 PK AUX CKT
604 OR STOP LAMP
200 BK MAIN CHASSIS 605 YL TURN LAMP - LEFT
201 BK OPR MON PANEL 606 GY TURN LAMP - RIGHT
229 BK EUI CONT 607 PK FLOOD LAMP - FRONT
A220 BK DRAFT CONTROL IDENT CODE 0 610 OR HEAD LAMP BASIC
611 PU HEAD LAMP HI
304 WH STARTER RELAY NO.1 OUTPUT 614 PU PARK/TAIL/DASH LAMP
306 GN STARTER RELAY COIL TO NEUT START SW 619 GN HEAD LAMP LO
307 OR KEY SW TO NEUT START SW 630 GY FLOOD LAMP REAR (ATTACH)
310 PU START AID SW TO START AID SOL 635 BR TURN SIGNAL COMMON
311 WH START AID SOL TO TEMP SW 647 GN LIGHT SW TO REAR FLOOD RELA Y
322 GY WARNING HORN (FORWARD) 648 BU LIGHT SW TO HEADLAMP BREAKER
649 YL LIGHT SW TO PARK/TAIL LAMP BREAKER
404 YL OPR MON HYD OIL TEMP
405 GY OPR MON OIL PRESS. (LO SETTING) 710 GN XMSN SPEED PICKUP SIGNAL
406 PU OPR MON COOLANT TEMP 795 YL DUAL HP SOL
410 WH OPR MON ACTION ALARM 870 OR 3 PT HITCH CONT - DOWN SOL
415 GN OPR MON TEST SW 871 BU 3 PT HITCH CONT - SOL COMMON
419 YL OPR MON PARKING BRAKE 872 YL 3 PT HITCH CONT - UP SOL
428 OR OPR MON XMSN OIL TEMP 888 PK 3 PT HITCH CONT - HITCH POSITION
441 OR ENG COOLANT TEMP GAGE 889 GY 3 PT HITCH CONT - HANDLE POSITION
447 PK FUEL LEVEL GAGE 890 PU 3 PT HITCH CONT - HOOKUP SW
449 BU SPDOM SENDER (SIGNAL NO. 1) 917 WH DUAL HP RELAY TO SW
450 YL TACH SENDER (+) B995 GY 3 PT HITCH CONTROL - DRAFT OFF /ON
457 PU OPR MON SYSTEM AIR PRESS B996 BR 3 PT HITCH CONTROL - SET POINT
459 PK OPR MON PANEL IMPLEMENT POSITION B997 PK
3 PT HITCH DRAFT SWITCH TO THROTTLE
SWITCH
464 GY OPR MON PANEL ENG OIL PRESS. SENSOR B995 GY 3 PT HITCH CONTROL - DRAFT OFF/ON
465 OR LO CHARGE PRESS. ALERT B997 PK
3 PT HITCH DRAFT SWITCH TO THROTTLE
SWITCH
466 WH OPR MON PANEL STER OIL TEMP C912 GN THROTTLE POSITION
471 PK XMSN NEUT TO PARKING BRAKE
477 YL SPDOM SENDER (SIGNAL NO. 2)
497 BU SENSOR POWER
A424 WH PRESS. TRANSDUCER 1 SIGNAL
A425 YL PRESS. TRANSDUCER 2 SIGNAL
A430 OR EUI CONT FAULT OUTPUT
B402 YL INDICATOR LAMP DIFF LUBE PRESS.
B437 BR HYDRAULIC OIL FILTER INDICATOR
WIRE DESCRIPTION CHART
Power Distribution Circuits Accessory Circuits
Ground Circuits
Lighting Circuits
Basic Machine Circuits
Monitoring Circuits
Control Circuits
Connectors
Machine
Location
Harness And/Or
Components
Schematic
Location
Connectors
Machine
Location
Harness And/Or
Components
Schematic
Location
40 Contacts C
E - 1065570
F - 9U3175
E-4 7 Contacts
E - 1065570
Trailer Conn
D-12
24 Contacts
*
A - 9U3196
Draft Control
B-10
D - 1075685
E - 1065570
D-2
15 Contacts
*
Q - 9U3645
Monitor Panel
E-11
E - 1065570
H - 9U3177
A-12
14 Contacts
*
F - 9U3175
Turn/Haz/Horn Sw
F-8
E - 1065570
K - 9U3182
F-12
A
C - 9U3173
F - 9U3175
B-5
F - 9U3175
R - 1018767
B-4
D - 1075685
E - 1065570
E-3
*
C - 9U3173
Rear Wiper Motor
D-11
E - 1065570
S - 1065569
C-2
*
F - 9U3175
Frt Wiper Sw
B-7
A
F - 9U3175
P - 9U3174
B-5
*
F - 9U3175
Rotary Light Sw
E-10
A
F - 9U3175
N - 9U2706
D-8
*
P - 9U3174
Frt Wiper Motor
D-4
A
F - 9U3175
Q - 9U3645
E-10
E - 9U3176
J - 9U3179
C-12
*
F - 9U3175
Monitor Panel
C-7
*
E - 9U3176
Radar Unit
A-5
*
Q - 9U3645
Performance Monitor
E-11
A - 9U3196
B - 9U3197
A-11
*
F - 9U3175
Monitor Panel
C-7
*
S - 1065569
Belt Tension Buffer
C-2
*
P - 9U3174
Radio
C-4
Machine locations are repeated for connectors located close together.
* = Connector is located at the component.
A = Connectors located in the dash.
C = Connectors located under dash near floor level.
6 Contacts
4 Contacts
8 Contacts
12 Contacts
HARNESS CONNECTOR LOCATION CHART
1
2
3
4
1
5
6
7
8
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6425 Coolant Temp (St Aid)
38.0± 3.0°C
(100.0 ± 5.0°F)
27.0°C MIN
(81.0°F MIN)
Normally Closed
3E-7504 Trans Oil Temp
107.0 ± 3.0°C
(225.0 ± 5.0°F)
98.0°C MIN
(208.0°F MIN)
Normally Open
3E-7674 Differential Lube Pressure
90.0 kPa MAX
(13.0 psi Max)
35.0 ± 21.0 kPa
(5.0 ± 3.0 psi)
A-B, Normally Open
A-C, Normally Closed
101-3780 Engine Oil Pressure
80.0 kPa MAX
(12.0 psi MAX)
38.0 ± 10.0 kPa
(6.0 ± 1.5 psi)
Normally Closed
103-4976 Transmission Pressure
310.0 kPa MAX
(45.0 psi MAX)
262.0 ± 20.0 kPa
(38.0 ± 3.0 psi)
Normally Closed
107-4658 Engine Coolant Temp
108.0± 3.0°C
(226.0 ± 5.0°F)
100.0°C MIN
(212.0°F MIN)
Normally Open ¹
107-4927 Hydraulic Oil Temp
82.0 ± 3.0°C
(180.0 ± 5.0°F)
74.0°C MIN
(165.0°F MIN)
Normally Open ¹
¹ To check contact position of switch measure from Contact 2 to case.
RESISTOR AND SOLENOID SPECIFICATIONS
Component Part No. Resistance (Ohms)¹
Resistor - Blower Speed 7T-3828
Overall1.0 ± 0.1
Tap 0.5 ± 0.05
Resistor - Flasher Load 3E-0108 8.0 ± 0.4
Solenoid - A/C Clutch 3E-1907 3.50 ± 0.15
Solenoid - Dual Horsepower 104-9257 5.40 ± 0.50
Solenoid - Hitch 100-3915 6.2
Solenoid - Start Aid 3E-6331 1.5
¹ At room temperature.
Related Electrical Service Manuals
Title Form No.
Alternator (21 SI):
Consist No. 9X-9096
SENR4757
Starting Motor (42-MT):
Consist No. 3E-7864
SENR3581
Machine
Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
1 Alternator B-2 C Resistor - Flasher Load E-5
2 Batteries B-1 11 Sender - Engine Oil Press E-2
3 Breaker - Alternator (135A) B-2 12 Sender - Fuel Level C-12
2 Batteries B-1 13 Sender/Switch - Coolant Temp E-2
3 Breaker - Main (135A) B-3 14 Sender/Switch - Hydraulic Oil Temp C-12
C Breaker - Running Lamp (20A) E-6 15 Sensor - Engine Speed E-2
C Breaker - Tail Lamp (10A) E-6 B Sensor - Hitch Handle Position C-10
4 Buffer - Belt Tension C-2 16 Sensor - Hitch Position B-12
B Control - Draft B-10 17 Sensor - LH Belt Tension Press F-1
C Flasher E-5 18 Sensor - RH Belt Tension Press B-2
C Fuses D-5 19 Sensor - Transmission Speed A-6
C Fuses E-6 20 Solenoid - A/C Clutch D-2
C Fuses F-6 D Solenoid - Air Seat D-10
A Gauge - Coolant Temp D-9 21 Solenoid - Dual Horsepower ¹ D-3
A Gauge - Fuel Level C-9 16 Solenoid - Hitch A-12
A Gauge - Hydraulic Oil Temp C-9 22 Solenoid - Start Aid D-2
A Gauge - Engine Oil Press D-9 A Switch - A/C B-9
A Gauge - Speed/Tach/Ser Hr D-9 13 Switch - A/C Pressure D-2
A Horn - Alarm D-5 A Switch - Blower Motor B-9
5 Horn - Foward Warning D-2 23 Switch - Differential Lube Press A-7
5 Horn - Foward Warning E-1 B Switch - Draft On/Off/Set B-10
A Monitor - Electronic Control Gp C-7 13 Switch - Eng Coolant Temp (St Aid) D-3
A Monitor - Performance E-11 A Switch - Front Wiper B-7
6 Motor - Blower B-4 B Switch - Hookup C-11
7 Motor - Front Wiper D-4 24 Switch - Hydraulic Filter Flow F-2
8 Motor - Rear Wiper D-11 D Switch - Key Start B-6
9 Motor - Starting C-3 B Switch - Neutral Start B-8
10 Radar (Perf Mon) A-5 11 Switch - Oil Press E-2
D Radio C-4 A Switch - Rear Wiper E-9
C Relay - Belt Tension F-7 A Switch - Rotary Light E-10
B Relay - Dual Horsepower ¹ B-10 D Switch - Running Lamp Dimmer B-7
C Relay - Foward Horn E-7 A Switch - Signal (Gage Cluster) D-9
C Relay - Front Flood Lamp E-7 A Switch - Start Aid F-9
C Relay - Lamp Test F-7 C Switch - Stop Lamp B-6
C Relay - Left Turn E-5 6 Switch - Thermostat B-4
3 Relay - Main Power B-3 B Switch - Throttle C-11
C Relay - Rear Flood Lamp E-7 25 Switch - Transmission Oil Temp A-6
C Relay - Right Turn E-5 19 Switches - Transmission Pressure 1 A-8
3 Relay - Start A-2 D Switch - Turn/Hazard/Horn F-8
C Relay - Trailer Left Turn E-5 14 Switch/Sender - Hydraulic Oil Temp C-12
C Relay - Trailer Right Turn F-5 13 Switch/Sender - Coolant Temp E-2
C Relays - Front Wiper D-6 A Voltmeter D-9
6 Resistor - Blower Motor Speed B-4
¹ Components used on Challenger 70C only.
Machine locations are repeated for components located close together.
A = Components located in the dash.
B = Components located in right side console.
C = Components located under dash near floor level.
D = Components located in operator's compartment.
COMPONENT LOCATION CHART
A
1
2
3
4
5
6
7
8
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
1
2
17
18
19
20
21
22
23
24
25
7
A
1
2
3
4
5 6
7
8
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
1
2
17
18
19
20
21
22
23
24
25
7
C48654P1
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
CHALLENGER
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
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