2003 JEEP GRAND CHEROKEE trailer

C309 - WHITE (LEFT BODY SIDE)
CAV CIRCUIT
1 D25 20YL/VT
2 M20 18YL/BK (RHD)
2 M20 20YL/BK (LHD)
3 M2 18YL (RHD)
3 M2 20YL/DG (LHD)
4 P112 20YL/WT
5 P114 20YL/RD
6 L1 20VT/BK
7 G5 20DB/WT
8 X75 20GY/LG (BUILT-UP-EXPORT)
9-
10 F70 20PK (LHD)
10 F70 18PK (RHD)
11 Q30 16TN
12 Z150 16BK
13 -
14 Z155 20BK/OR (EXCEPT LHD BASE)
14 Z155 18BK/OR (RHD/LHD BASE)
15 G73 20LG/OR
C310 (BUILT-UP-EXPORT) - LT.GRAY (TRAILER TOW SIDE)
CAV CIRCUIT
1 F9 14RD/BK
2 L62 20BR/RD
3 L1 18VT/BK
4 F30 14RD/TN
5 L7 18BK/YL
6 Z150 14RD/BK
7 B40 14LB
8 Z150 14BK
9 L50 18WT/TN
10 L63 20DG/RD
11 Z1 14BK
12 -
13 -
14 -
C310 (BUILT-UP-EXPORT) - LT.GRAY (BODY SIDE)
CAV CIRCUIT
1 F9 14RD/BK
2 L62 18BR/RD (LHD)
2 L62 20BR/RD (RHD)
3 L1 18VT/BK
4 F30 14RD/TN
5 L7 18BK/YL
6 L95 18DG/YL
7 B40 14LB
8 Z150 14BK
9 L50 16WT/TN (RHD)
9 L50 18WT/TN (LHD)
10 L63 20DG/RD
11 Z150 14BK
12 -
13 -
14 -
8W - 80 - 54 8W-80 CONNECTOR PIN-OUTWJ

C310 (EXCEPT BUILT-UP-EXPORT) - LT. GREEN
(TRAILER TOW SIDE)
CAV CIRCUIT
1 F9 14RD/BK
2 L62 20BR/RD
3 L1 18VT/BK
4 F30 14RD/TN
5 L7 18BK/YL
6 Z150 14RD/BK
7 B40 14LB
8 Z150 14BK
9 L50 18WT/TN
10 L63 20DG/RD
C310 (EXCEPT BUILT-UP-EXPORT) - LT. GREEN
(LEFT BODY SIDE)
CAV CIRCUIT
1 F9 14RD/BK
2 L62 18BR/RD
3 L1 18VT/BK
4 F30 14RD/TN
5 L7 18BK/YL
6 Z150 14BK
7 B40 14LB
8 Z150 14BK
9 L50 18WT/TN
10 L63 20DG/RD
C311 - WHITE (LIFTGATE SIDE)
CAV CIRCUIT
1 L50 18WT/TN
2 Z1 18BK
C311 - WHITE (CHMSL SIDE)
CAV CIRCUIT
1 L50 18WT/TN
2 Z1 18BK
C312 - WHTE (LIFTGATE SIDE)
CAV CIRCUIT
1 Z1 18BK
2 L7 18BK/YL
3 P101 18OR/PK
4 F70 18PK
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 55

DRIVER SEAT BELT SWITCH-2WAY
CAV CIRCUIT FUNCTION
1 R57 20DG DRIVER SEAT BELT SWITCH SENSE
2 R59 20LB DRIVER SEAT BELT SWITCH GROUND
DRIVER SIDE IMPACT SENSOR - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1- -
2- -
3 R133 20LB/DG DRIVER SIDE IMPACT SENSOR GROUND
4 R131 20LG/YL DRIVER SIDE IMPACT SENSOR SIGNAL
EGR SOLENOID (DIESEL) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 F15 18RD/DG FUSED AUTO SHUT DOWN RELAY OUTPUT
2 K35 20GY/YL EGR SOLENOID CONTROL
ELECTRIC BRAKE (EXCEPT BUILT-UP-EXPORT) - BLUE 4 WAY
CAV CIRCUIT FUNCTION
1 Z151 14BK GROUND
2 L50 18WT/TN PRIMARY BRAKE SWITCH SIGNAL
3 B40 12LB TRAILER TOW BRAKE B(+)
4 F9 14RD/BK FUSED B(+)
ELECTRONIC SPEED CONTROL SERVO - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 V36 20TN/RD (RHD/GAS) SPEED CONTROL VACUUM SOLENOID CONTROL
1 V36 18TN/RD (LHD GAS) SPEED CONTROL VACUUM SOLENOID CONTROL
2 V35 20LG/RD (RHD/GAS) SPEED CONTROL VENT SOLENOID CONTROL
2 V35 18LG/RD (LHD GAS) SPEED CONTROL VENT SOLENOID CONTROL
3 V30 20DB/RD SPEED CONTROL BRAKE SWITCH OUTPUT
4 Z307 20BK GROUND
8W - 80 - 74 8W-80 CONNECTOR PIN-OUTWJ

TEMPERATURE VALVE ACTUATOR (MTC) - BLACK 6 WAY
CAV CIRCUIT FUNCTION
5- -
6- -
7 Z132 20BK/OR GROUND
8 C67 20RD/LB BLEND AIR DOOR POSITION CONTROL
9- -
10 F22 20WT/PK FUSED IGNITION SWITCH OUTPUT (RUN)
THROTTLE POSITION SENSOR (4.0L) - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 K7 18OR 5 VOLT SUPPLY
2 K4 18BK/LB SENSOR GROUND
3 K22 18OR/RD THROTTLE POSITION SENSOR SIGNAL
THROTTLE POSITION SENSOR (4.7L)-3WAY
CAV CIRCUIT FUNCTION
1 K7 18OR 5 VOLT SUPPLY
2 K22 18OR/RD THROTTLE POSITION SENSOR SIGNAL
3 K4 18BK/LB SENSOR GROUND
TRAILER TOW BRAKE LAMP RELAY - BLACK 5 WAY
CAV CIRCUIT FUNCTION
30 (3) F9 14RD/BK FUSED B(+)
85 (2) L50 18WT/TN PRIMARY BRAKE SWITCH SIGNAL
86 (1) Z150 18BK GROUND
87 (5) L95 14DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
87A
(4)L94 14OR/WT TRAILER TOW BRAKE LAMP RELAY OUTPUT
TRAILER TOW CIRCUIT BREAKER - BLACK 2 WAY
CAV CIRCUIT FUNCTION
A F30 14RD/WT FUSED CIGAR LIGHTER RELAY OUTPUT
B F30 14RD/TN CIGAR LIGHTER RELAY OUTPUT
8W - 80 - 122 8W-80 CONNECTOR PIN-OUTWJ

TRAILER TOW CONNECTOR - BLACK 10 WAY
CAV CIRCUIT FUNCTION
1- -
2 L62 14BR/RD RIGHT TURN SIGNAL
3 L1 18VT/BK BACK-UP LAMP FEED
4 F30 14RD/WT FUSED CIGAR LIGHTER RELAY OUTPUT
5 L7 18BK/YL PARK LAMP RELAY OUTPUT
6- -
7 B40 14LB TRAILER TOW BRAKE B(+)
8 Z150 14BK GROUND
9 Z150 14BK GROUND
10 L63 14DG/RD LEFT TURN SIGNAL
TRAILER TOW LEFT TURN RELAY - BLACK 5 WAY
CAV CIRCUIT FUNCTION
30 (3) L63 16DG/RD LEFT TURN SIGNAL
85 (2) L63 14DG/RD LEFT TURN SIGNAL
86 (1) Z150 18BK GROUND
87 (5) L94 14OR/WT TRAILER TOW BRAKE LAMP RELAY OUTPUT
87A (4) L95 14DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
TRAILER TOW RIGHT TURN RELAY - BLACK 5 WAY
CAV CIRCUIT FUNCTION
30 (3) L62 14BR/RD RIGHT TURN SIGNAL
85 (2) L62 20BR/RD RIGHT TURN SIGNAL
86 (1) Z150 18BK GROUND
87 (5) L94 14OR/WT TRAILER TOW BRAKE LAMP RELAY OUTPUT
87A (4) L95 14DG/YL TRAILER TOW BRAKE LAMP RELAY OUTPUT
TRANSFER CASE POSITION SENSOR - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 K77 20BR/WT (DIESEL) TRANSFER CASE POSITION SENSOR SIGNAL
1 K77 18LG/BK (GAS) TRANSFER CASE POSITION SENSOR INPUT
2 K4 20BK/LB (DIESEL) SENSOR GROUND
2 K4 18BK/LB (GAS) SENSOR GROUND
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 123

CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Trailer Tow Brake Lamp Relay BK Left Quarter Panel N/S
Trailer Tow Circuit Breaker BK Left Quarter Panel N/S
Trailer Tow Connector BK In Rear Bumper 39
Trailer Tow Left Turn Relay BK Left Quarter Panel N/S
Trailer Tow Right Turn Relay BK Left Quarter Panel N/S
Transfer Case Position Sensor BK On Transfer Case 7
Transmission Control Module
(4.7L)BK Rear of Engine Compartment 14, 15, 18
Transmission Control Module
C1 (Diesel)BK Right Rear Side of Engine
CompartmentN/S
Transmission Control Module
C2 (Diesel)BK Right Rear Side of Engine
Compartment8
Transmission Solenoid (4.0L
Gas)BK Left Side of Transmission 12
Transmission Solenoid
Assembly (Diesel)BK On Transmission 8
Transmission Solenoid/TRS
Assembly (4.7L)GY Left Side of Transmission 16
Underhood Lamp BK At Lamp 6
Vehicle Information Center BK In Overhead Console N/S
Viscous/Cabin Heater (Diesel) BK Left Rear of Engine Compartment N/S
Washer Fluid Level Switch GY Left Front of Engine Compartment 3, 4
Wastegate Solenoid (Diesel) Near Power Distribution Center N/S
Water In Fuel Sensor (Diesel) BK Left Rear of Engine Compartment N/S
GROUNDS
GROUND NUMBER LOCATION FIG.
G100 (4.0L and Diesel) Near Starter N/S
G100 (4.7L) Near Intake Plenum N/S
G101 Near Battery 2
G102 Right Side of Engine 14, 15
G103 Right Side of Engine 7, 8, 10, 11, 14, 15
G104 (4.0L) Right Rear of Engine 10, 11
G104 (4.7L) Left Side of Engine 13
G105 Right Side of Engine 8
G106 Left Side of Engine Compartment 3, 4
G107 Left Side of Engine Compartment 3, 4
G108 Near Power Distribution Center 5
G200 Near Airbag Control Module 19, 20, 21, 22
G201 Near Airbag Control Module 19, 20, 21, 22
G300 Near Right Front Seat 34, 36
G301 Near Left Front Seat 33, 35
WJ8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 11
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICE
NUMBERLOCATION FIG.
S403 Near T/O for Rear Wiper Motor 38
S404 Near T/O for Liftgate Lock Motor 38
S405 In T/O for Rear Wiper Motor 38
S406 (Except
Built-Up-Export)In T/O for Trailer Tow Right Turn Relay N/S
S407 (Except
Built-Up-Export)Near T/O for Trailer Tow Left Turn Relay N/S
S408 Near T/O for Trailer Tow Circuit Breaker N/S
S410 In T/O for Trailer Tow Connector 39
S411 Near T/O for License Lamp No.1 N/S
S412 In T/O for C312 N/S
WJ8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 17
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

Fig. 38 LIFTGATE
Fig. 39 TRAILER TOW
8W - 91 - 50 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONWJ
CONNECTOR/GROUND/SPLICE LOCATION (Continued)