relay JEEP GRAND CHEROKEE 2003 WJ / 2.G Manual Online

8W-21 STARTING SYSTEM
Component Page
Battery........................ 8W-21-2, 3, 4
Engine Control Module................ 8W-21-4
Engine Starter Motor............. 8W-21-2, 3, 4
Engine Starter Motor Relay........ 8W-21-2, 3, 4
Fuse 8......................... 8W-21-2, 3, 4
Fuse 31........................ 8W-21-2, 3, 4Component Page
Junction Block.................. 8W-21-2, 3, 4
Park/Neutral Position Switch......... 8W-21-2, 3
Power Distribution Center......... 8W-21-2, 3, 4
Powertrain Control Module........... 8W-21-2, 3
Transmission Control Module......... 8W-21-2, 3
Transmission Solenoid/TRS Assembly . . . 8W-21-2, 3
WJ8W-21 STARTING SYSTEM 8W - 21 - 1

8W-30 FUEL/IGNITION SYSTEM
Component Page
A/C Compressor Clutch Relay . . . 8W-30-23, 35, 39, 41, 42
A/C Pressure Transducer........ 8W-30-21, 42, 45, 31
Accelerator Pedal Position Sensor........ 8W-30-37, 48
Adjustable Pedals Module................ 8W-30-33
Adjustable Pedals Motor/Sensor Assembly.... 8W-30-33
Adjustable Pedals Switch................ 8W-30-33
Auto Shut Down Relay...... 8W-30-8, 9, 12, 24, 25, 26,
27, 28, 29, 30, 35, 39, 41
Battery Temperature Sensor.......... 8W-30-2, 11, 50
Body Control Module................... 8W-30-46
Boost Pressure Sensor.................. 8W-30-45
Brake Lamp Switch.............. 8W-30-4, 5, 32, 51
Camshaft Position Sensor........ 8W-30-18, 19, 20, 49
Capacitor........................... 8W-30-12
Capacitor No. 1....................... 8W-30-16
Capacitor No. 2....................... 8W-30-17
Clockspring...................... 8W-30-4, 5, 38
Coil On Plug No. 1.................... 8W-30-17
Coil On Plug No. 2.................... 8W-30-16
Coil On Plug No. 3.................... 8W-30-17
Coil On Plug No. 4.................... 8W-30-16
Coil On Plug No. 5.................... 8W-30-17
Coil On Plug No. 6.................... 8W-30-16
Coil On Plug No. 7.................... 8W-30-17
Coil On Plug No. 8.................... 8W-30-16
Coil Rail............................ 8W-30-12
Controller Antilock Brake........... 8W-30-2, 36, 51
Crankcase Heater..................... 8W-30-35
Crankshaft Position Sensor....... 8W-30-18, 19, 20, 49
Data Link Connector............... 8W-30-6, 7, 46
Diagnostic Junction Port.......... 8W-30-6, 7, 33, 46
EGR Solenoid........................ 8W-30-50
Electronic Speed Control Servo........... 8W-30-4, 5
Engine Control Module.... 8W-30-34, 35, 36, 37, 38, 39,
40, 41, 42, 43, 44, 45,
46, 47, 48, 49, 50, 51
Engine Coolant Temperature Sensor . . . 8W-30-21, 22, 47
Engine Oil Pressure Sensor......... 8W-30-21, 22, 45
Engine Starter Motor Relay......... 8W-30-18, 19, 39
EVAP/Purge Solenoid.................. 8W-30-4, 5
Fuel Injector No. 1............... 8W-30-13, 15, 44
Fuel Injector No. 2............... 8W-30-13, 14, 44
Fuel Injector No. 3............... 8W-30-13, 15, 44
Fuel Injector No. 4............... 8W-30-13, 14, 44
Fuel Injector No. 5............... 8W-30-13, 15, 44
Fuel Injector No. 6.................. 8W-30-13, 14
Fuel Injector No. 7..................... 8W-30-15
Fuel Injector No. 8..................... 8W-30-14
Fuel Pressure Sensor................... 8W-30-37
Fuel Pressure Solenoid.................. 8W-30-47
Fuel Pump Module.................... 8W-30-10
Fuel Pump Relay.................. 8W-30-8, 9, 10
Fuel Tank Module..................... 8W-30-45
Fuse 6........................... 8W-30-8, 42
Fuse 10............................ 8W-30-33
Fuse 11............................ 8W-30-43
Fuse 12......................... 8W-30-8, 9, 40
Fuse 13............................ 8W-30-41
Fuse 16 . . 8W-30-24, 25, 26, 27, 28, 29, 30, 35, 37, 39, 41
Component Page
Fuse 19............................. 8W-30-9
Fuse 21......................... 8W-30-4, 5, 32
Fuse 22............................ 8W-30-34
Fuse 23............................ 8W-30-39
Fuse 24............................. 8W-30-9
Fuse 26..................... 8W-30-8, 12, 41, 47
Fuse 31............................ 8W-30-39
G103....................... 8W-30-8, 34, 39, 46
G104......................... 8W-30-26, 27, 30
G105........................... 8W-30-35, 39
G108........................... 8W-30-23, 43
G123.............................. 8W-30-50
G300............................ 8W-30-4, 33
G301............................ 8W-30-5, 10
Generator...................... 8W-30-3, 23, 35
Glow Plug No. 1...................... 8W-30-42
Glow Plug No. 2...................... 8W-30-43
Glow Plug No. 3...................... 8W-30-42
Glow Plug No. 4...................... 8W-30-43
Glow Plug No. 5...................... 8W-30-42
Glow Plug Relay No. 1............. 8W-30-35, 42, 43
Glow Plug Relay No. 2............. 8W-30-35, 42, 43
Hydraulic Cooling Module . . . 8W-30-3, 24, 25, 30, 31, 43
Idle Air Control Motor.................. 8W-30-20
Intake Air Temperature Sensor....... 8W-30-21, 22, 38
Intake Port Swirl Actuator............... 8W-30-39
Junction Block......... 8W-30-4, 5, 8, 9, 32, 33, 39, 40
Knock Sensor........................ 8W-30-11
Leak Detection Pump................... 8W-30-23
Manifold Absolute Pressure Sensor.... 8W-30-20, 21, 22
Mass Air Flow Sensor.................. 8W-30-37
Output Speed Sensor.................... 8W-30-2
Oxygen Sensor 1/1 Upstream...... 8W-30-25, 26, 28, 29
Oxygen Sensor 1/2 Downstream.... 8W-30-24, 25, 26, 30
Oxygen Sensor 2/1 Upstream........ 8W-30-27, 28, 29
Oxygen Sensor 2/2 Downstream...... 8W-30-24, 27, 30
Oxygen Sensor Downstream Relay . . 8W-30-24, 26, 27, 30
Park/Neutral Position Switch............. 8W-30-33
Power Distribution Center...... 8W-30-8, 9, 12, 24, 25,
26, 27, 28, 29, 30, 34, 35,
37, 39, 41, 42, 43, 47
Powertrain Control Module . . . 8W-30-2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20, 21, 22, 23, 24, 25,
26, 27, 28, 29, 30, 31, 32
Shifter Assembly............... 8W-30-2, 32, 38, 40
Speed Control Switch No. 1........... 8W-30-4, 5, 38
Speed Control Switch No. 2........... 8W-30-4, 5, 38
Throttle Position Sensor................. 8W-30-20
Transfer Case Position Sensor........... 8W-30-8, 51
Transmission Control
Module............. 8W-30-6, 7, 20, 23, 32, 36, 40
Transmission Control Relay.............. 8W-30-23
Transmission Solenoid................ 8W-30-3, 21
Transmission Solenoid/TRS Assembly....... 8W-30-33
Viscous/Cabin Heater................... 8W-30-39
Viscous/Cabin Heater Relay...... 8W-30-35, 39, 41, 42
Wastegate Solenoid.................... 8W-30-35
Water In Fuel Sensor................... 8W-30-50
WJ8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 1

8W-31 TRANSMISSION CONTROL SYSTEM
Component Page
Auto Shut Down Relay................ 8W-31-4
Back-Up Lamp Relay................ 8W-31-15
Body Control Module................ 8W-31-14
Brake Lamp Switch............... 8W-31-14, 15
Controller Antilock Brake............. 8W-31-17
Crankshaft Position Sensor.......... 8W-31-9, 10
Data Link Connector............ 8W-31-9, 10, 16
Diagnostic Junction Port............ 8W-31-4, 15
Engine Control Module............ 8W-31-16, 17
Engine Starter Motor Relay..... 8W-31-4, 5, 6, 12
Fuel Pump Relay.................... 8W-31-4
Fuse 5........................... 8W-31-2, 3
Fuse 12......................... 8W-31-4, 15
Fuse 20.......................... 8W-31-5, 6
Fuse 21........................ 8W-31-14, 15
Fuse 28.......................... 8W-31-2, 8
Fuse 31............................ 8W-31-4
G102.......................... 8W-31-11, 13
G108.............................. 8W-31-3
G200.......................... 8W-31-14, 15
G300............................. 8W-31-15
G301............................. 8W-31-15Component Page
Generator.......................... 8W-31-2
Input Speed Sensor.................. 8W-31-13
Junction Block............. 8W-31-4, 5, 6, 14, 15
Left Rear Lamp Assembly............ 8W-31-5, 6
Line Pressure Sensor................ 8W-31-13
Output Speed Sensor.............. 8W-31-8, 13
Park/Neutral Position Switch........... 8W-31-6
Power Distribution Center......... 8W-31-2, 3, 8
Powertrain Control
Module......... 8W-31-2, 4, 5, 6, 7, 8, 9, 10, 14
Right Rear Lamp Assembly........... 8W-31-5, 6
Shifter Assembly.............. 8W-31-14, 15, 16
Throttle Position Sensor............... 8W-31-7
Transfer Case Position Sensor........ 8W-31-6, 16
Transmission Control
Module........... 8W-31-3, 4, 7, 9, 10, 11, 12,
13, 14, 16, 17, 18
Transmission Control Relay . . . 8W-31-2, 3, 8, 11, 12
Transmission Solenoid.............. 8W-31-2, 8
Transmission Solenoid Assembly........ 8W-31-18
Transmission Solenoid/TRS
Assembly.............. 8W-31-3, 5, 11, 12, 13
WJ8W-31 TRANSMISSION CONTROL SYSTEM 8W - 31 - 1

8W-39 VEHICLE THEFT SECURITY SYSTEM
Component Page
Automatic Headlamp Light
Sensor/VTSS LED.................. 8W-39-3
Body Control Module . . . 8W-39-2, 3, 4, 5, 7, 8, 9, 10
Clockspring....................... 8W-39-7, 8
Diagnostic Junction Port............... 8W-39-9
Driver Cylinder Lock Switch............ 8W-39-6
Driver Door Lock Motor/Ajar Switch...... 8W-39-6
Driver Door Module................ 8W-39-6, 11
Engine Starter Motor Relay............ 8W-39-2
Fuse 7........................ 8W-39-3, 9, 11
Fuse 8............................. 8W-39-2
Fuse 18.......................... 8W-39-7, 8
Fuse 22.......................... 8W-39-2, 9
Fuse 28............................ 8W-39-2
G106............................. 8W-39-10
G108............................ 8W-39-7, 8
G200.............................. 8W-39-9
G300............................ 8W-39-5, 6Component Page
G301....................... 8W-39-4, 5, 6, 11
Hood Ajar Switch................... 8W-39-10
Horn No. 1....................... 8W-39-7, 8
Horn No. 2....................... 8W-39-7, 8
Horn Relay....................... 8W-39-7, 8
Horn Switch...................... 8W-39-7, 8
Ignition Switch...................... 8W-39-2
Junction Block........ 8W-39-2, 3, 4, 5, 7, 8, 9, 11
Left Liftgate Ajar Switch.............. 8W-39-4
Left Rear Door Lock Motor/Ajar Switch . . . 8W-39-5
Liftgate Flip-Up Ajar Switch............ 8W-39-4
Passenger Door Lock Motor/Ajar Switch . . . 8W-39-6
Passenger Door Module............... 8W-39-6
Power Distribution Center......... 8W-39-2, 7, 8
Remote Keyless Module.............. 8W-39-11
Right Liftgate Ajar Switch............. 8W-39-4
Right Rear Door Lock Motor/Ajar Switch . . 8W-39-5
Sentry Key Immobilizer Module......... 8W-39-9
WJ8W-39 VEHICLE THEFT SECURITY SYSTEM 8W - 39 - 1

8W-41 HORN/CIGAR LIGHTER/POWER OUTLET
Component Page
Body Control Module............... 8W-41-2, 3
Cigar Lighter....................... 8W-41-4
Cigar Lighter Relay.................. 8W-41-4
Circuit Breaker...................... 8W-41-4
Clockspring....................... 8W-41-2, 3
Front Power Outlet................... 8W-41-5
Fuse 9............................. 8W-41-5
Fuse 18.......................... 8W-41-2, 3
Fuse 26............................ 8W-41-4
Fuse 27............................ 8W-41-5
Fuse 29............................ 8W-41-4
G108............................ 8W-41-2, 3Component Page
G200............................ 8W-41-4, 5
G300.............................. 8W-41-5
Horn No. 1....................... 8W-41-2, 3
Horn No. 2....................... 8W-41-2, 3
Horn Relay....................... 8W-41-2, 3
Horn Switch...................... 8W-41-2, 3
Junction Block................ 8W-41-2, 3, 4, 5
Power Connector..................... 8W-41-5
Power Distribution Center......... 8W-41-2, 3, 5
Rear Power Outlet................... 8W-41-5
Trailer Tow Circuit Breaker............ 8W-41-4
WJ8W-41 HORN/CIGAR LIGHTER/POWER OUTLET 8W - 41 - 1

8W-42 AIR CONDITIONING-HEATER
Component Page
A/C Compressor Clutch.............. 8W-42-3, 4
A/C Compressor Clutch Relay......... 8W-42-3, 4
A/C Pressure Transducer........ 8W-42-11, 12, 13
Auto Shut Down Relay.......... 8W-42-4, 11, 12
Automatic Zone Control Module . 8W-42-2, 5, 6, 7, 8
Blower Motor................... 8W-42-2, 6, 9
Blower Motor Controller............. 8W-42-2, 6
Blower Motor Resistor Block............ 8W-42-9
Body Control Module........... 8W-42-5, 6, 9, 10
Diagnostic Junction Port............... 8W-42-5
Driver Blend Door Motor/Actuator..... 8W-42-7, 8
Engine Control Module............. 8W-42-4, 13
Fuse 1......................... 8W-42-2, 6, 9
Fuse 7............................. 8W-42-6
Fuse 11......................... 8W-42-5, 10
Fuse 16...................... 8W-42-4, 11, 12
Fuse 20......................... 8W-42-2, 10
Fuse 21.......................... 8W-42-3, 4Component Page
G104.............................. 8W-42-3
G108.......................... 8W-42-11, 12
G200......................... 8W-42-2, 6, 10
Glow Plug Relay No. 1................ 8W-42-4
Hydraulic Cooling Module.......... 8W-42-11, 12
Junction Block.............. 8W-42-2, 3, 5, 6, 10
Manual Temperature Control...... 8W-42-2, 9, 10
Mode Door Motor/Actuator........... 8W-42-7, 8
Oxygen Sensor Downstream Relay . . . 8W-42-11, 12
Passenger Blend Door Motor/Actuator . . 8W-42-7, 8
Power Distribution
Center............. 8W-42-2, 3, 4, 6, 9, 11, 12
Powertrain Control Module....... 8W-42-3, 11, 12
Rear Window Defogger............. 8W-42-5, 10
Rear Window Defogger Relay........ 8W-42-5, 10
Recirculation Door Motor/Actuator..... 8W-42-7, 8
Temperature Valve Actuator........... 8W-42-10
Viscous/Cabin Heater Relay............ 8W-42-4
WJ8W-42 AIR CONDITIONING-HEATER 8W - 42 - 1

8W-45 BODY CONTROL MODULE
Component Page
Accessory Delay Relay................ 8W-45-9
Ambient Temperature Sensor........... 8W-45-7
Ash Receiver Lamp................... 8W-45-4
Automatic Headlamp Light
Sensor/VTSS LED................ 8W-45-3, 7
Automatic Zone Control Module...... 8W-45-4, 10
Body Control
Module.......... 8W-45-2, 3, 4, 5, 6, 7, 8, 9, 10
Cargo Lamp...................... 8W-45-5, 6
Clockspring......................... 8W-45-9
Coolant Level Sensor............... 8W-45-5, 6
Data Link Connector................ 8W-45-5, 6
Diagnostic Junction Port............. 8W-45-5, 6
Driver Heated Seat Switch.......... 8W-45-4, 10
Fog Lamp Relay..................... 8W-45-3
Front Washer Pump.................. 8W-45-8
Front Wiper Motor................... 8W-45-8
Fuse 6............................. 8W-45-4
Fuse 7............................. 8W-45-2
Fuse 22............................ 8W-45-2
Fuse 25............................ 8W-45-9
Fuse 27............................ 8W-45-4
Fuse 28............................ 8W-45-2
G108............................ 8W-45-5, 6
G200.......................... 8W-45-2, 5, 6
Glove Box Lamp................... 8W-45-5, 6
High Beam Relay.................... 8W-45-3
Hood Ajar Switch.................... 8W-45-7Component Page
Horn Relay......................... 8W-45-7
Ignition Switch.................... 8W-45-5, 6
Junction Block......... 8W-45-2, 3, 4, 5, 6, 7, 8, 9
Left Courtesy Lamp................ 8W-45-5, 6
Left Liftgate Ajar Switch.............. 8W-45-8
Left Multi-Function Switch........... 8W-45-3, 4
Left Rear Door Lock Motor/Ajar Switch . . . 8W-45-7
Left Remote Radio Switch.............. 8W-45-9
Liftgate Flip-Up Ajar Switch............ 8W-45-8
Low Beam Relay..................... 8W-45-3
Low Beam/Daytime Running
Lamp Relay...................... 8W-45-3
Manual Temperature Control........ 8W-45-4, 10
Overhead Map/Courtesy Lamp........ 8W-45-5, 6
Park Lamp Relay.................. 8W-45-3, 4
Passenger Heated Seat Switch....... 8W-45-4, 10
Radio............................. 8W-45-4
Rear Window Defogger Relay......... 8W-45-4, 9
Rear Wiper Motor.................... 8W-45-8
Right Courtesy Lamp............... 8W-45-5, 6
Right Liftgate Ajar Switch............. 8W-45-8
Right Multi-Function Switch........... 8W-45-8
Right Rear Door Lock Motor/Ajar Switch . . 8W-45-7
Right Remote Radio Switch............ 8W-45-9
Shifter Assembly..................... 8W-45-4
Washer Fluid Level Switch............. 8W-45-8
Wiper High/Low Relay................ 8W-45-2
Wiper On/Off Relay................... 8W-45-8
WJ8W-45 BODY CONTROL MODULE 8W - 45 - 1

8W-48 REAR WINDOW DEFOGGER
Component Page
Automatic Zone Control Module......... 8W-48-2
Body Control Module................. 8W-48-2
Fuse 11............................ 8W-48-2
G301.............................. 8W-48-2Component Page
Junction Block...................... 8W-48-2
Manual Temperature Control........... 8W-48-2
Rear Window Defogger................ 8W-48-2
Rear Window Defogger Relay........... 8W-48-2
WJ8W-48 REAR WINDOW DEFOGGER 8W - 48 - 1

8W-49 OVERHEAD CONSOLE
Component Page
Accessory Delay Relay................ 8W-49-6
Automatic Day/Night Mirror.......... 8W-49-4, 5
Back-Up Lamp Relay................. 8W-49-5
Diagnostic Junction Port........... 8W-49-2, 3, 6
Driver Power Mirror.................. 8W-49-4
Fuse 7............................. 8W-49-7
Fuse 8........................... 8W-49-2, 3
Fuse 22........................ 8W-49-2, 3, 4
Fuse 25............................ 8W-49-6
G106.............................. 8W-49-7Component Page
G301........................ 8W-49-2, 3, 5, 6
Intrusion Transceiver Module........... 8W-49-7
Junction Block............... 8W-49-2, 3, 4, 6, 7
Left Rear Lamp Assembly.............. 8W-49-5
Park/Neutral Position Switch........... 8W-49-5
Rain Sensor........................ 8W-49-6
Siren.............................. 8W-49-7
Transmission Solenoid/TRS Assembly..... 8W-49-5
Vehicle Information Center........... 8W-49-2, 3
WJ8W-49 OVERHEAD CONSOLE 8W - 49 - 1

8W-50 FRONT LIGHTING
Component Page
Automatic Headlamp Light
Sensor/VTSS LED.................. 8W-50-2
Body Control Module...... 8W-50-2, 3, 4, 6, 12, 13
Combination Flasher................ 8W-50-3, 6
Fog Lamp Relay.................... 8W-50-12
Fuse 3............................. 8W-50-4
Fuse 6............................. 8W-50-6
Fuse 14......................... 8W-50-4, 13
Fuse 15......................... 8W-50-4, 13
Fuse 16............................ 8W-50-4
Fuse 24........................... 8W-50-12
G106.................. 8W-50-5, 10, 11, 12, 13
G108.................... 8W-50-5, 7, 8, 12, 13
G200....................... 8W-50-3, 6, 9, 13
Headlamp Leveling Switch............. 8W-50-9
High Beam Relay.................. 8W-50-3, 4
Junction Block.............. 8W-50-3, 4, 5, 6, 7,
8, 10, 11, 12, 13
Left Fog Lamp..................... 8W-50-12
Left Front Park Lamp............. 8W-50-10, 11
Left Front Park/Turn Signal Lamp...... 8W-50-10Component Page
Left Front Side Marker Lamp.......... 8W-50-10
Left Front Turn Signal Lamp.......... 8W-50-11
Left Headlamp Leveling Motor......... 8W-50-11
Left High Beam Headlamp............. 8W-50-5
Left Low Beam Headlamp........... 8W-50-5, 13
Left Multi-Function Switch......... 8W-50-2, 3, 4
Left Side Repeater Lamp............. 8W-50-11
Low Beam Relay..................... 8W-50-4
Low Beam/Daytime Running
Lamp Relay...................... 8W-50-13
Park Lamp Relay.................... 8W-50-6
Right Fog Lamp.................... 8W-50-12
Right Front Park Lamp............. 8W-50-7, 8
Right Front Park/Turn Signal Lamp...... 8W-50-7
Right Front Side Marker Lamp......... 8W-50-7
Right Front Turn Signal Lamp.......... 8W-50-8
Right Headlamp Leveling Motor......... 8W-50-8
Right High Beam Headlamp............ 8W-50-5
Right Low Beam Headlamp......... 8W-50-5, 13
Right Rear Lamp Assembly........... 8W-50-7, 8
Right Side Repeater Lamp............. 8W-50-8
WJ8W-50 FRONT LIGHTING 8W - 50 - 1