2003 JEEP Grand Cherokee

Jeep Grand Cherokee Laredo 2003 - BUZZERS, RELAYS & TIMERS

Jeep Grand Cherokee Laredo 2003 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Compressor Clutch Relay	In power distribution center.
Automatic Shut Down Relay	In power distribution center.
Cigar Lighter Relay	On junction block.
Combination Flasher	On junction block.
Engine Starter Motor Relay	In power distribution center.
Foglight Relay	On junction block.
Fuel Pump Relay	In power distribution center.
High Beam Relay	On junction block.
Horn Relay	In power distribution center.
Low Beam/Daytime Running Lamp Relay	On junction block.
Low Beam Relay	On junction block.
O2S Heater Relay (Downstream)	In power distribution center.
Park Lamp Relay	On junction block.
Power Outlet Relay	On junction block.
Radiator Fan Relay	Behind bumper fascia, below right headlight. See Fig. 11.
Rear Window Defogger Relay	On junction block.
Sun Roof Delay Relay	On junction block.
Trailer Tow Brake Lamp Relay	At left rear quarterpanel.
Trailer Tow Left Turn Relay	At left rear quarterpanel.
Trailer Tow Right Turn Relay	At left rear quarterpanel.
Transmission Control Relay	In power distribution center.
Wiper High/Low Relay	In power distribution center.
Wiper On/Off Relay	In power distribution center.

Jeep Grand Cherokee Laredo 2003 - CIRCUIT PROTECTION DEVICES

Jeep Grand Cherokee Laredo 2003 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Circuit Breaker No. 1	On junction block.
Circuit Breaker No. 2	On junction block.
Junction Block	Behind left side of dash.
Power Distribution Center	At right front corner of engine compartment, next to battery.
Trailer Tow Circuit Breaker	At left rear quarterpanel.

Jeep Grand Cherokee Laredo 2003 - CONTROL UNITS

Jeep Grand Cherokee Laredo 2003 CONTROL UNITS LOCATION

Component	Location
Air Bag Control Module	Below center floor console, near park brake.
Blower Motor Controller	On heater-A/C housing, inboard of blower motor. See Fig. 12.
Body Control Module	On left end of dash, attached to junction block.
Controller Anti-Lock Brake	On left side of engine compartment, mounted to hydraulic control unit. See Fig. 10.
Door Module (Left)	Behind left front door panel.
Door Module (Right)	Behind right front door panel.
Fuel Pump Module	On top of fuel tank.
Heated Seat Module (HSM)	Under front of driver's seat.
Memory Heated Seat Module (MHSM)	Under front of driver's seat.
Memory Seat Module (MSM)	Under front of driver's seat.
Powertrain Control Module	On right side of firewall.
Sentry Key Immobilizer Module	Near ignition lock cylinder housing.
Sun Roof Control Module	Near front of sun roof opening.
Transmission Control Module (4.0L)	On right inner fender.
Transmission Control Module (4.7L)	On right inner fender. See Fig. 4.

Jeep Grand Cherokee Laredo 2003 - MOTORS

Jeep Grand Cherokee Laredo 2003 MOTORS LOCATION

Component	Location
Blower Motor	On passenger side end of heater-A/C housing. See Fig. 12.
Driver Blend Door Motor (AZC)	On front of heater-A/C housing. See Fig. 12.
Idle Air Control Motor (4.0L)	On throttle body. See Fig. 1.
Idle Air Control Motor (4.7L)	On throttle body. See Fig. 3.
Leak Detection Pump	In left rear quarterpanel.
Mode Door Motor (AZC)	On left end of heater-A/C housing. See Fig. 12.
Passenger Blend Door Motor (AZC)	On heater-A/C housing. See Fig. 12.
Radiator Fan Motor	Behind radiator. See Fig. 11.
Rear Washer Pump	Bottom of washer reservoir. See Fig. 10.
Rear Wiper Motor	On liftgate inner panel.
Recirculation Door Motor (AZC)	On heater-A/C housing.
Windshield Washer Pump	Bottom of washer reservoir. SeeFig. 10.
Windshield Wiper Motor	On left side of firewall. See Fig. 10.

Jeep Grand Cherokee Laredo 2003 - SENDING UNITS & SENSORS

Jeep Grand Cherokee Laredo 2003 SENDING UNITS & SENSORS LOCATION

Component	Location
Ambient Air Temperature Sensor	On right side of radiator support, near headlight. See Fig. 11.
Battery Temperature Sensor	In center of battery tray. See Fig. 11.
Camshaft Position Sensor (4.0L)	On right side of engine, near oil filter. See Fig. 2.
Camshaft Position Sensor (4.7L)	On front top of right cylinder head. See Fig. 4.
Coolant Level Sensor	In coolant reservoir/overflow tank. See Fig. 11.
Crankshaft Position Sensor (4.0L)	At left rear side of engine block, on transmission bellhousing. See Fig. 2.
Crankshaft Position Sensor (4.7L)	On right side of engine block, above starter motor. See Fig. 7.
Engine Coolant Temperature Sensor (4.0L)	At top front of engine, on thermostat housing. See Fig. 1.
Engine Coolant Temperature Sensor (4.7L)	Near front of intake manifold. See Fig. 6.
Engine Oil Pressure Sensor (4.0L)	On right rear side of engine block. See Fig. 2.
Engine Oil Pressure Sensor (4.7L)	On lower left front of engine block, above oil filter. See Fig. 5.
Input Speed Sensor (4.7L)	At left front side of transmission. See Fig. 9.
Intake Air Temperature Sensor (4.0L)	In intake manifold plenum, near front of throttle body. See Fig. 1.
Intake Air Temperature Sensor (4.7L)	In intake manifold plenum, near left side of throttle body. See Fig. 3.
Line Pressure Sensor (4.7L)	On right rear side of transmission.
Manifold Absolute Pressure Sensor (4.0L)	On side of throttle body. See Fig. 1.
Manifold Absolute Pressure Sensor (4.7L)	On front of intake manifold. See Fig. 6.
Output Speed Sensor (4.0L)	At left rear side of transmission. See Fig. 8.
Output Speed Sensor (4.7L)	At left rear side of transmission. See Fig. 9.
Oxygen Sensor 1/1 (Upstream) (4.0L)	Before front catalytic converter.
Oxygen Sensor 1/1 (Upstream) (4.7L)	Before left catalytic converter.
Oxygen Sensor 1/2 (Downstream) (4.0L)	After front catalytic converter. See Fig. 8.
Oxygen Sensor 1/2 (Downstream) (4.7L)	After left catalytic converter.
Oxygen Sensor 2/1 (Upstream) (4.0L)	Before rear catalytic converter.
Oxygen Sensor 2/1 (Upstream) (4.7L)	Before right catalytic converter.
Oxygen Sensor 2/2 (Downstream) (4.0L)	After rear catalytic converter.
Oxygen Sensor 2/2 (Downstream) (4.7L)	After right catalytic converter.
Throttle Position Sensor (4.0L)	On throttle body. See Fig. 1.
Throttle Position Sensor (4.7L)	On throttle body. See Fig. 3.
Wheel Speed Sensor (Left Front)	On left front steering knuckle.
Wheel Speed Sensor (Left Rear)	On left rear brake backing plate.
Wheel Speed Sensor (Right Front)	On right front steering knuckle.
Wheel Speed Sensor (Right Rear)	On right rear brake backing plate.

Jeep Grand Cherokee Laredo 2003 - SOLENOIDS & SOLENOID VALVES

Jeep Grand Cherokee Laredo 2003 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Brake Shift Interlock Solenoid	At top of steering column.
Duty Cycle EVAP/Purge Solenoid	On left fender side shield, forward of EVAP canister. See Fig. 10.
Liftgate Flip-Up Release Solenoid	In liftgate.
Transmission Solenoid Assembly (4.0L)	On transmission valve body. See Fig. 8.
Transmission Solenoid Assembly (4.7L)	On transmission valve body. See Fig. 9.
Vehicle Speed Control Servo	Below battery tray. See Fig. 11.

Jeep Grand Cherokee Laredo 2003 - SWITCHES

Jeep Grand Cherokee Laredo 2003 SWITCHES LOCATION

Component	Location
A/C Pressure Transducer	Behind right side radiator support. See Fig. 11.
Brake Warning Indicator Switch	In master cylinder reservoir.
Park/Neutral Position Switch (4.0L)	On lower left side of transmission. See Fig. 8.
Seat Belt Switch	Integral to driver seat belt buckle.
Stoplight Switch	Top of brake pedal arm.
Transfer Case Switch (4.0L)	On transfer case.
Washer Fluid Level Switch	Near bottom of washer reservoir. See Fig. 10.

Jeep Grand Cherokee Laredo 2003 - MISCELLANEOUS

Jeep Grand Cherokee Laredo 2003 MISCELLANEOUS LOCATION

Component	Location
Blower Motor Resistor Block	Bottom of heater-A/C housing, inboard of blower motor.
Data Link Connector (DLC)	Under left side of dash, near steering column.
Power Amplifier	Under passenger side rear seat cushion.
Rail Coil (4.0L)	On right side of cylinder head. See Fig. 2.

Jeep Grand Cherokee Laredo 2003 - CONNECTORS

Jeep Grand Cherokee Laredo 2003 CONNECTORS LOCATION

Component	Location
C100 (Black, 3 Pin)	At right front of engine compartment. See Fig. 11.
C102 (Black, 14 Pin)	At right rear of engine compartment.
C103 (4.0L) (Gray, 14 Pin)	At right rear of engine compartment. See Fig. 2.
C103 (4.7L) (Gray, 14 Pin)	At right rear of engine compartment. See Fig. 4.
C104 (4.0L) (Light Gray, 10 Pin)	At right rear of engine compartment. See Fig. 2.
C104 (4.7L) (Light Gray, 10 Pin)	At right rear of engine compartment. See Fig. 4.
C107 (Black, 60 Pin)	At left side of firewall. See Fig. 10.
C108 (Black, 2 Pin)	At left side of firewall. See Fig. 10.
C109 (Black, 2 Pin)	Near transfer case switch.
C111 (Black, 6 Pin)	At left front frame, near windshield washer pump. See Fig. 10.
C112 (Light Gray, 6 Pin)	At right front frame, near horns.
C200 (Gray, 60 Pin)	Near left kick panel.
C202 (AZC) (White, 12 Pin)	At HVAC unit, on right side of dash panel.
C202 (MTC) (White, 16 Pin)	At HVAC unit, on right side of dash panel.
C203 (AZC) (White, 2 Pin)	At HVAC unit, on right side of dash panel.
C300 (Gray, 60 Pin)	Near junction block.
C302 (Black, 14 Pin)	At driver door.
C303 (White, 11 Pin)	At right rear door.
C304 (Black, 10 Pin)	Under driver seat.
C306 (Black, 6 Pin)	Under passenger seat.
C307 (White, 11 Pin)	At left rear door.
C308 (White, 11 Pin)	At top of liftgate.
C309 (White, 15 Pin)	At left rear quarterpanel.
C310 (Light Green, 14 Pin)	Above left rear wheel housing opening.
C311 (White, 2 Pin)	At top of liftgate.
C312 (4 Pin)	At center of liftgate.
C313 (White, 2 Pin)	In driver door.
C314 (Light Gray, 14 Pin)	At passenger door.
C315 (8 Pin)	At rear of right rear quarter window.
C318 (2 Pin)	At "B" pillar.

Jeep Grand Cherokee Laredo 2003 - GROUNDS

Jeep Grand Cherokee Laredo 2003 GROUNDS LOCATION

Component	Location
G100 (4.0L)	Near starter.
G100 (4.7L)	Near intake plenum.
G101	Near battery.
G102 (4.7L)	At right side of engine. See Fig. 7.
G103 (4.0L)	At right side of engine. See Fig. 2.
G103 (4.7L)	At right side of engine. See Fig. 7.
G104 (4.0L)	At right rear of engine. See Fig. 2.
G104 (4.7L)	At left side of engine. See Fig. 5.
G105	At right side of engine.
G106	At left side of engine compartment. See Fig. 10.
G107	At left side of engine compartment. See Fig. 10.
G108	Near power distribution center. See Fig. 11.
G200	Near air bag control module.
G201	Near air bag control module.
G300	Near right front seat.
G301	Under driver seat.

Jeep Grand Cherokee Laredo 2003 - SPLICES

Jeep Grand Cherokee Laredo 2003 SPLICES LOCATION

Component	Location
S100	Near breakout for power distribution center eyelet.
S102 (4.0L)	Near breakout for G103. See Fig. 2.
S102 (4.7L)	Near breakout for fuel injector No. 1. See Fig. 3.
S103 (4.7L)	Near breakout for engine oil pressure sensor. See Fig. 5.
S104 (4.0L)	Near breakout for A/C compressor. See Fig. 1.
S104 (4.7L)	Near breakout for oxygen sensor 2/2 downstream.
S105 (4.0L)	Near breakout for G104. See Fig. 2.
S105 (4.7L)	Near breakout for fuel injector No. 7. See Fig. 3.
S106 (4.0L)	In breakout for oxygen sensors. See Fig. 8.
S106 (4.7L)	Near breakout for C103. See Fig. 4.
S107 (4.0L)	Near breakout for fuel injector No. 5. See Fig. 1.
S107 (4.7L)	Near breakout for fuel injector No. 7. See Fig. 3.
S109 (4.0L)	Near breakout for fuel injector No. 2. See Fig. 1.
S109 (4.7L)	Near breakout for coil on plug No. 6. See Fig. 4.
S110 (4.0L)	Near breakout for oxygen sensor.
S111 (4.0L)	Near breakout for oxygen sensor.
S111 (4.7L)	In breakout for oxygen sensor.
S112 (4.0L)	Near breakout for C102, C103 & C104. See Fig. 2.
S112 (4.7L)	Near breakout for coil on plug No. 6.
S113 (4.7L)	Near breakout for transmission control module.
S114 (4.0L)	Near breakout for transmission control module.
S114 (4.7L)	Near breakout for transmission control module.
S115 (4.0L)	Near breakout for transmission control module.
S115 (4.7L)	Near breakout for transmission control module.
S116 (4.0L)	Near powertrain control module.
S116 (4.7L)	Near breakout for C102, C103 & C104. See Fig. 4.
S117 (4.7L)	Near breakout for C102, C103 & C104. See Fig. 4.
S118 (4.7L)	Near breakout for coil on plug No. 4. See Fig. 4.
S119 (4.7L)	In breakout for crankshaft position sensor.
S120 (4.7L)	Near breakout for powertrain control module.
S121 (4.7L)	Near breakout for idle air control motor. See Fig. 3.
S122 (4.0L)	Near breakout for G103. See Fig. 2.
S122 (4.7L)	Near breakout for input speed sensor. See Fig. 9.
S123 (4.0L)	Near breakout for G104. See Fig. 2.
S124 (4.7L)	In trough, near breakout for capacitor. See Fig. 3.
S125	Near breakout for powertrain control module.
S126 (4.0L)	Near breakout for battery temperature sensor.
S127	In trough, near breakout for powertrain control module. See Fig. 11.
S128	In trough, under power distribution center. See Fig. 11.
S130	In breakout for C102. See Fig. 10.
S131	In trough, near breakout for power distribution center. See Fig. 11.
S132	Near breakout for battery temperature sensor. See Fig. 11.
S133	Near breakout for battery temperature sensor. See Fig. 11.
S134	In trough, near breakout for anti-lock brake controller. See Fig. 10.
S140	Near breakout for anti-lock brake controller.
S141	Near breakout for anti-lock brake controller. See Fig. 10.
S142	In breakout for C102. See Fig. 11.
S151	In headlight assembly.
S152	In headlight assembly.
S153	In headlight assembly.
S154	In headlight assembly.
S155	In headlight assembly.
S156	In headlight assembly.
S159	In breakout for C101.
S160 (4.7L)	In breakout for C102.
S163	Near breakout for leak detection pump. See Fig. 10.
S168	Near breakout box for intake air temperature sensor.
S169	Near breakout for engine control module.
S170	Near breakout for engine control module.
S171	Near breakout for C113.
S172	Near breakout for C113.
S174	Near washer fluid level switch connector.
S176	Near breakout for intake air temperature sensor.
S200	In trough, near breakout for passenger heated seat switch.
S201	In trough, near breakout for front power outlet.
S202	In trough, near breakout for passenger heated seat switch.
S203	In trough, near breakout for cigar lighter.
S204	In trough, near breakout for power connector.
S205	Near breakout for adjustable pedal switch.
S206	Near breakout for adjustable pedal switch.
S207	In trough, near breakout for radio connectors.
S208	In trough, near breakout for radio connectors.
S210	In trough, near breakout for left courtesy lamp.
S211	In trough, near breakout for left courtesy lamp.
S212	In trough, near breakout for left courtesy lamp.
S213	Near breakout for cruise control switch No. 1.
S214	Near breakout for cruise control switch No. 1.
S215	Near breakout for horn switch.
S216	Near breakout for remote radio switch No. 2.
S217	In trough, near breakout for power connector.
S221	At right center of dash.
S222	At right center of dash.
S223	Near breakout for adjustable pedal switch.
S224	At right center of dash.
S300	Near breakout for G304.
S301	In breakout for C304.
S302	In sill trough, near breakout for C307.
S303	In sill trough, near breakout for C307.
S304	In sill trough, near breakout for C307.
S305	In sill trough, near breakout for C307.
S306	Near breakout for C310.
S307	Near breakout for C310.
S308	Between breakout for C310 & left rear lamp assembly.
S309	Between breakout for C310 & left rear lamp assembly.
S310	Between breakout for C310 & left rear lamp assembly.
S311	Near breakout for left rear lamp assembly.
S312	Near breakout for C200.
S313	Near breakout for G301.
S314	Near breakout for C314.
S315	In center spline, near breakout for G301.
S316	Near breakout for junction block.
S317	Between troughs, near breakout for C314.
S318	Between troughs, near breakout for C314.
S319	In trough, near breakout for C304.
S323	Near breakout for C314.
S324	In breakout for C200.
S326	Near breakout for C200.
S327	Near breakout for C307.
S328	In sill trough, near breakout for G300.
S329	In sill trough, near breakout for G300.
S330	Near breakout for G300.
S331	In sill trough, near breakout for C303.
S332	In sill trough, near breakout for C303.
S333	Near breakout for power amplifier.
S334	In breakout for power amplifier.
S335	Near breakout for C314.
S336	Near breakout for driver power window motor.
S338	Near breakout for passenger power window motor.
S339	Near breakout for passenger power window motor.
S340	In breakout for passenger door module.
S341	Near breakout for C306.
S345	Near breakout for sun roof switch.
S346	Near breakout for left visor/vanity lamp.
S347	Near breakout for left visor/vanity lamp.
S348	Near breakout for automatic day/night mirror.
S349	Near breakout for automatic day/night mirror.
S351	Near breakout for seat belt switch.
S352	Near breakout for seat belt switch.
S353	Near breakout for driver lumbar switch.
S355	Near breakout for C304 & C306.
S356	In breakout for left rear door lock motor/ajar switch.
S357	In breakout for right rear door lock motor/ajar switch.
S358	Near left "B" pillar sill trough.
S359	Near breakout for C302.
S360	In breakout for C302.
S362	In breakout for C200.
S363	In breakout for C200.
S364	Near "B" pillar sill trough.
S366	Near breakout for junction block.
S368	Near breakout for power amplifier.
S369	Near breakout for left visor vanity lamp.
S370	Near breakout for sun roof module.
S371	In trailer tow harness jumper.
S374	Near rear window defogger ground connector.
S375	Near rear window defogger ground connector.
S376	Near breakout for liftgate flip-up ajar switch.
S377	Near breakout for rear wiper motor.
S378	Near breakout for liftgate lock motor.
S379	In breakout for rear wiper motor.
S380	Near breakout for license lamp No. 1.
S381	In breakout for C312.