2003 JEEP GRAND CHEROKEE radiator

INSTALLATION
The vacuum reservoir is located in the right/front
corner of the vehicle behind the front bumper fascia
(Fig. 8).
(1) Connect vacuum hose to reservoir.
(2) Install reservoir and tighten 2 bolts to 3 N´m
(25 in. lbs.) torque.
(3) Install front bumper and grill assembly.
Fig. 8 Vacuum Reservoir Location
1 - RADIATOR FAN RELAY
2 - VACUUM RESERVOIR
3 - BOLT
4 - RIGHT FRONT FENDER
Fig. 9 Vacuum Reservoir Removal/Installation
1 - VACUUM HOSE
2 - RADIATOR
3 - VACUUM RESERVOIR
WJSPEED CONTROL 8P - 9
VACUUM RESERVOIR (Continued)

Component Page
LIFTGATE FLIP-UP PUSH
BUTTON SWITCH................ 8W-80-97
LIFTGATE FLIP-UP RELEASE
SOLENOID...................... 8W-80-97
LIFTGATE POWER LOCK MOTOR..... 8W-80-97
LINE PRESSURE SENSOR (4.7L)...... 8W-80-98
MANIFOLD ABSOLUTE PRESSURE
SENSOR (4.0L)................... 8W-80-98
MANIFOLD ABSOLUTE PRESSURE
SENSOR (4.7L)................... 8W-80-98
MANUAL TEMPERATURE
CONTROL C1 (MTC).............. 8W-80-98
MANUAL TEMPERATURE
CONTROL C2 (MTC).............. 8W-80-99
MASS AIR FLOW SENSOR (DIESEL) . . . 8W-80-99
MODE DOOR MOTOR/ACTUATOR
(AZC).......................... 8W-80-99
NEEDLE MOVEMENT SENSOR
(DIESEL)....................... 8W-80-99
OUTPUT SPEED SENSOR (4.0L)...... 8W-80-99
OUTPUT SPEED SENSOR (4.7L)..... 8W-80-100
OVERHEAD MAP/COURTESY LAMP . . 8W-80-100
OXYGEN SENSOR 1/1 UPSTREAM.... 8W-80-100
OXYGEN SENSOR 1/2 DOWNSTREAM . 8W-80-100
OXYGEN SENSOR 2/1 UPSTREAM.... 8W-80-100
OXYGEN SENSOR 2/2
DOWNSTREAM................. 8W-80-101
PARK/NEUTRAL POSITION SWITCH
(4.0L).......................... 8W-80-101
PARK/NEUTRAL POSITION SWITCH
(DIESEL)...................... 8W-80-101
PASSENGER AIRBAG.............. 8W-80-101
PASSENGER BLEND DOOR
MOTOR/ACTUATOR (LHD) (AZC) . . . 8W-80-101
PASSENGER BLEND DOOR
MOTOR/ACTUATOR (RHD) (AZC) . . . 8W-80-102
PASSENGER CURTAIN AIRBAG...... 8W-80-102
PASSENGER DOOR LOCK MOTOR/AJAR
SWITCH....................... 8W-80-102
PASSENGER DOOR MODULE C1..... 8W-80-102
PASSENGER DOOR MODULE C2..... 8W-80-103
PASSENGER FRONT DOOR
COURTESY LAMP............... 8W-80-103
PASSENGER FRONT POWER
WINDOW MOTOR............... 8W-80-103
PASSENGER HEATED SEAT BACK
(PREMIUM I/III)................. 8W-80-103
PASSENGER HEATED SEAT CUSHION
(PREMIUM I/III)................. 8W-80-104
PASSENGER HEATED SEAT SWITCH . 8W-80-104
PASSENGER LUMBAR MOTOR
(MIDLINE/PREMIUM)............ 8W-80-104
PASSENGER LUMBAR SWITCH
(MIDLINE/PREMIUM)............ 8W-80-104
PASSENGER POWER MIRROR....... 8W-80-105Component Page
PASSENGER POWER SEAT FRONT
RISER MOTOR.................. 8W-80-105
PASSENGER POWER SEAT
HORIZONTAL MOTOR........... 8W-80-105
PASSENGER POWER SEAT REAR
RISER MOTOR.................. 8W-80-105
PASSENGER POWER SEAT RECLINER
MOTOR (MIDLINE/PREMIUM)..... 8W-80-106
PASSENGER POWER SEAT SWITCH
(MIDLINE/PREMIUM)............ 8W-80-106
PASSENGER REAR POWER
WINDOW MOTOR............... 8W-80-106
PASSENGER REAR POWER
WINDOW SWITCH............... 8W-80-106
PASSENGER SEAT BELT SWITCH.... 8W-80-106
PASSENGER SIDE IMPACT
SENSOR....................... 8W-80-107
POWER AMPLIFIER C1
(PREMIUM RADIO).............. 8W-80-107
POWER AMPLIFIER C2
(PREMIUM RADIO).............. 8W-80-107
POWER CONNECTOR.............. 8W-80-108
POWERTRAIN CONTROL
MODULE C1 (GAS).............. 8W-80-108
POWERTRAIN CONTROL
MODULE C2 (GAS).............. 8W-80-109
POWERTRAIN CONTROL
MODULE C3 (GAS).............. 8W-80-110
RADIATOR FAN MOTOR............ 8W-80-110
RADIATOR FAN RELAY............. 8W-80-111
RADIO C1........................ 8W-80-111
RADIO C2........................ 8W-80-111
RAIN SENSOR (AUTOWIPE)......... 8W-80-112
REAR POWER OUTLET............. 8W-80-112
REAR WASHER PUMP.............. 8W-80-112
REAR WIPER MOTOR.............. 8W-80-112
RECIRCULATION DOOR
MOTOR/ACTUATOR (AZC)......... 8W-80-112
RED BRAKE WARNING INDICATOR
SWITCH....................... 8W-80-113
REMOTE KEYLESS MODULE
(JAPAN)....................... 8W-80-113
RIGHT COURTESY LAMP........... 8W-80-113
RIGHT DOOR HANDLE
COURTESY LAMP............... 8W-80-113
RIGHT FOG LAMP................. 8W-80-113
RIGHT FRONT DOOR SPEAKER..... 8W-80-114
RIGHT FRONT IMPACT SENSOR..... 8W-80-114
RIGHT FRONT PARK LAMP......... 8W-80-114
RIGHT FRONT PARK/TURN SIGNAL LAMP
(EXCEPT BUILT-UP-EXPORT)...... 8W-80-114
RIGHT FRONT SIDE MARKER LAMP
(EXCEPT BUILT-UP-EXPORT)...... 8W-80-115
RIGHT FRONT TURN SIGNAL LAMP
(BUILT-UP-EXPORT)............. 8W-80-115
8W - 80 - 4 8W-80 CONNECTOR PIN-OUTWJ

ENGINE CONTROL MODULE C1 (DIESEL) - BLACK 81 WAY
CAV CIRCUIT FUNCTION
55 B22 20DG/YL VEHICLE SPEED SENSOR SIGNAL
56 K225 18BK ACCELERATOR PEDAL POSITION SENSOR 2 GROUND
57 - -
58 K4 20BK/LB WATER IN FUEL SENSOR GROUND
59 K900 18GY INTAKE PORT SWIRL ACTUATOR SIGNAL
60 K7 20RD/WT FUEL PRESSURE SENSOR 5 VOLT SUPPLY
61 K51 20DB/YL AUTO SHUT DOWN RELAY CONTROL
62 - -
63 - -
64 - -
65 - -
66 - -
67 K173 20GY HYDRAULIC RADIATOR FAN SOLENOID CONTROL
68 - -
69 C13 20DB/RD A/C COMPRESSOR CLUTCH RELAY CONTROL
70 - -
71 - -
72 K236 20GY/PK GLOW PLUG RELAY NO. 2 CONTROL
73 - -
74 T752 20DG/RD ENGINE STARTER MOTOR RELAY CONTROL
75 K132 20BR/BK VISCOUS/CABIN HEATER RELAY CONTROL
76 Y42 20BR/BK WASTEGATE SOLENOID CONTROL
77 K152 20WT GLOW PLUG RELAY NO. 1 CONTROL
78 - -
79 - -
80 K46 20DB/BK FUEL PRESSURE SOLENOID CONTROL
81 K46 20DB/BK FUEL PRESSURE SOLENOID CONTROL
ENGINE CONTROL MODULE C2 (DIESEL) - BLACK 40 WAY
CAV CIRCUIT FUNCTION
82 D21 20PK SCI TRANSMIT
83 - -
84 - -
85 - -
86 - -
87 - -
88 - -
89 K35 20GY/YL EGR SOLENOID CONTROL
90 - -
91 - -
92 - -
93 - -
94 G123 20DG/WT WATER IN FUEL SENSOR SIGNAL
95 - -
96 - -
97 - -
98 - -
99 - -
100 - -
101 - -
102 - -
103 - -
104 - -
8W - 80 - 76 8W-80 CONNECTOR PIN-OUTWJ

HORN NO. 2 - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 Z307 18BK GROUND
2 X2 18DG/RD HORN RELAY OUTPUT
HYDRAULIC COOLING MODULE - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 F15 18DB/WT (DIESEL) FUSED AUTO SHUT DOWN RELAY OUTPUT
1 F142 18OR/DG (GAS) FUSED AUTO SHUT DOWN RELAY OUTPUT
2 K173 18LG (DIESEL) HYDRAULIC RADIATOR FAN RELAY CONTROL
2 K173 18LG (GAS) RADIATOR FAN RELAY CONTROL
3 Z500 18BK GROUND
IDLE AIR CONTROL MOTOR - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 K59 18VT/BK IDLE AIR CONTROL NO. 4 DRIVER
2 K40 18BR/WT IDLE AIR CONTROL NO. 3 DRIVER
3 K60 18YL/BK IDLE AIR CONTROL NO. 2 DRIVER
4 K39 18GY/BK IDLE AIR CONTROL NO. 1 DRIVER
IGNITION SWITCH C1 - WHITE 6 WAY
CAV CIRCUIT FUNCTION
1 A41 12YL IGNITION SWITCH OUTPUT (START)
2 A2 12PK/BK FUSED B(+)
3 A22 12BK/OR IGNITION SWITCH OUTPUT (RUN)
4 A1 12RD FUSED B(+)
5 A31 12RD/BK IGNITION SWITCH OUTPUT (RUN-ACC)
6 A21 12DB IGNITION SWITCH OUTPUT (RUN-START)
IGNITION SWITCH C2 - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 G26 20LB KEY-IN IGNITION SWITCH SENSE
2 Z234 20BK GROUND
8W - 80 - 84 8W-80 CONNECTOR PIN-OUTWJ

POWERTRAIN CONTROL MODULE C2 (GAS) - WHITE 32 WAY
CAV CIRCUIT FUNCTION
1 T54 18VT (4.0L) TRANSMISSION TEMPERATURE SENSOR SIGNAL
2 K26 18VT (4.7L) FUEL INJECTOR NO. 7 DRIVER
3- -
4 K11 18WT/DB FUEL INJECTOR NO. 1 DRIVER
5 K13 18YL/WT FUEL INJECTOR NO. 3 DRIVER
6 K38 18GY FUEL INJECTOR NO. 5 DRIVER
7 K97 14BR (4.7L) COIL DRIVER NO. 7
8 K88 18PK (4.0L) GOVERNOR PRESSURE SOLENOID CONTROL
9 K92 14TN/PK COIL DRIVER NO. 2
10 K20 18DG GENERATOR FIELD DRIVER
11 T20 18LB (4.0L) TORQUE CONVERTER CLUTCH SOLENOID CONTROL
12 K58 18BR/DB FUEL INJECTOR NO. 6 DRIVER
13 K28 18GY/LB (4.7L) FUEL INJECTOR NO. 8 DRIVER
14 - -
15 K12 18TN FUEL INJECTOR NO. 2 DRIVER
16 K14 18LB/BR FUEL INJECTOR NO. 4 DRIVER
17 K173 18LG RADIATOR FAN RELAY CONTROL
18 - -
19 C18 18DB A/C PRESSURE SIGNAL
20 - -
21 T60 18BR (4.0L) 3-4 SHIFT SOLENOID CONTROL
22 - -
23 G60 18GY/YL ENGINE OIL PRESSURE SENSOR SIGNAL
24 - -
25 T13 18DB/BK (4.0L) SPEED SENSOR GROUND
26 - -
27 B22 18DG/YL VEHICLE SPEED SENSOR SIGNAL
28 T14 18LG/WT (4.0L) OUTPUT SPEED SENSOR SIGNAL
29 T25 18LG/RD (4.0L) GOVERNOR PRESSURE SENSOR SIGNAL
30 K30 18PK/YL (4.0L) TRANSMISSION CONTROL RELAY CONTROL
31 K6 18VT/BK 5 VOLT SUPPLY
32 - -
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 109

POWERTRAIN CONTROL MODULE C3 (GAS) - GRAY 32 WAY
CAV CIRCUIT FUNCTION
1 C13 18DB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL
2- -
3 K51 18DB/YL AUTO SHUT DOWN RELAY CONTROL
4 V36 18TN/RD SPEED CONTROL VACUUM SOLENOID CONTROL
5 V35 18LG/RD SPEED CONTROL VENT SOLENOID CONTROL
6- -
7 K42 18DB/LG (4.7L HIGH OUTPUT) KNOCK SENSOR NO. 1 SIGNAL
8 K99 18BR/OR OXYGEN SENSOR 1/1 HEATER CONTROL
9 K512 18RD/YL (EXCEPT 4.0L
BUILT-UP-EXPORT)OXYGEN SENSOR DOWNSTREAM RELAY CONTROL
10 K106 18WT/DG (EXCEPT
BUILT-UP-EXPORT)LEAK DETECTION PUMP SOLENOID CONTROL
11 V32 18OR/DG SPEED CONTROL SUPPLY
12 F42 18DG/LG FUSED AUTO SHUT DOWN RELAY OUTPUT
13 T10 18YL/DG (4.7L RHD) TORQUE MANAGEMENT REQUEST SENSE
13 T6 18OR/WT (4.0L LHD) OVERDRIVE OFF SWITCH SENSE
13 T10 18DG/LG (4.7L LHD) TORQUE MANAGEMENT REQUEST SENSE
13 T6 18OR/BK (4.0L RHD) OVERDRIVE OFF SWITCH SENSE
14 K107 18OR/PK (EXCEPT
BUILT-UP-EXPORT)LEAK DETECTION PUMP SWITCH SENSE
15 K25 18VT/LG BATTERY TEMPERATURE SENSOR SIGNAL
16 K299 18BR/WT OXYGEN SENSOR 1/2 HEATER CONTROL
17 - -
18 K142 18GY/BK (4.7L HIGH OUTPUT) KNOCK SENSOR NO. 2 SIGNAL
19 K31 18BR FUEL PUMP RELAY CONTROL
20 K52 18PK/BK DUTY CYCLE EVAP/PURGE SOLENOID CONTROL
21 - -
22 - -
23 - -
24 K29 18WT/PK SECONDARY BRAKE SWITCH SIGNAL
25 K125 18WT/DB GENERATOR SOURCE
26 K226 18LB/YL FUEL LEVEL SENSOR SIGNAL
27 D21 18PK SCI TRANSMIT
28 - -
29 D32 18LG (LHD) SCI RECEIVE
29 D32 18LG/DG (RHD) SCI RECEIVE
30 D25 18VT/YL PCI BUS
31 - -
32 V37 18RD/LG SPEED CONTROL SWITCH SIGNAL
RADIATOR FAN MOTOR - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 C23 12DG RADIATOR FAN RELAY OUTPUT
2 Z4 12BK/PK GROUND
8W - 80 - 110 8W-80 CONNECTOR PIN-OUTWJ

RADIATOR FAN RELAY - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 Z1 20BK GROUND
2 C24 20DB/PK RADIATOR FAN RELAY CONTROL
3 C23 12DG RADIATOR FAN RELAY OUTPUT
4 A16 12GY FUSED B(+)
RADIO C1 - GRAY 22 WAY
CAV CIRCUIT FUNCTION
1 F60 16RD/WT FUSED B(+)
2 X12 16WT/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
3 E2 20OR PANEL LAMPS DRIVER
4- -
5- -
6- -
7 X54 18VT RIGHT FRONT SPEAKER (+)
8 X56 18DB/PK RIGHT FRONT SPEAKER (-)
9 X55 18BR/RD LEFT FRONT SPEAKER (-)
10 X53 18DG/OR LEFT FRONT SPEAKER (+)
11 Z9 16BK GROUND
12 F60 16RD/WT FUSED B(+)
13 X64 18BR/WT ENABLE SIGNAL TO AMPLIFIER
14 D25 20YL/VT/DB PCI BUS
15 - -
16 - -
17 - -
18 X51 18WT/DG LEFT REAR SPEAKER (+)
19 X57 18DG/WT LEFT REAR SPEAKER (-)
20 X58 18DB/OR RIGHT REAR SPEAKER (-)
21 X52 18DB/WT RIGHT REAR SPEAKER (+)
22 Z9 16BK GROUND
RADIO C2 - GRAY 10 WAY
CAV CIRCUIT FUNCTION
1 X40 20WT/RD AUDIO OUT RIGHT
2 Z4 20WT/BK GROUND
3 Z5 20BK/LB SHIELD
4- -
5 X112 20RD IGNITION SWITCH OUTPUT (RUN-ACC)
6 X41 20WT/DG AUDIO OUT LEFT
7 Z17 20BK GROUND
8- -
9- -
10 X160 20YL FUSED B(+)
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 111

8W-91 CONNECTOR/GROUND/SPLICE LOCATION
TABLE OF CONTENTS
page
CONNECTOR/GROUND/SPLICE LOCATION
DESCRIPTION..........................1
CONNECTOR/GROUND/SPLICE
LOCATION
DESCRIPTION
This section provides illustrations identifying con-
nector, ground, and splice locations in the vehicle.Connector, ground, and splice indexes are provided.
Use the wiring diagrams in each section for connec-
tor, ground, and splice identification. Refer to the
appropriate index for the proper figure number. For
items that are not shown in this section N/S is placed
in the Fig. column.
CONNECTORS
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
A/C Compressor Clutch BK At A/C Compressor 9, 13
A/C Pressure Transducer BK Right Front of Engine Compartment 3, 4, 5
Accelerator Pedal Position
Sensor (Diesel)BK Rear of Engine Compartment Near
Fuel/Water Seperator7
Adjustable Pedals Module
(Except Built-up Export)GN Above Drivers Control Pedals N/S
Adjustable Pedals Motor/
Sensor Assembly (Except
Built-up Export)Above Drivers Control Pedals N/S
Adjustable Pedals Switch WT Drivers Lower Kick Panel 21
Airbag Control Module (ORC)
C1YL Below Center Floor Console, Near
Park Brake19, 20, 21, 22
Airbag Control Module (ORC)
C2YL Below Center Floor Console, Near
Park Brake19, 20, 21, 22
Ambient Temperature Sensor BK On Radiator Center Support 5
Antenna Module (Built-up-
export)WT Above Right Quarter Window N/S
Ash Receiver Lamp BK Below Cigarette Lighter 19, 20
Automatic Day/Night Mirror BK In Front of Rear View Mirror N/S
Automatic Headlamp Light
Sensor/VTSS LEDBK Near Left Instrument Panel Speaker 19, 20
Automatic Zone Control
Module - C1 (AZC)WT Left Side of HVAC Housing N/S
Automatic Zone Control
Module - C2 (AZC)WT Left Side of HVAC Housing N/S
Battery Temperature Sensor BK Below Battery Tray 4, 5
Blower Motor BK Behind Right Hand Side of
Instrument PanelN/S
WJ8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 1