ELECTRICAL COMPONENT LOCATOR 1989-90 ELECTRICAL COMPONENT LOCATIONS Jeep - Electrical Components

Jeep Cherokee 1990 - BUZZERS, RELAYS & TIMERS

Jeep Cherokee 1990 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Clutch Relay	On relay block, on right wheelwell. See Fig. 1 .
A/C-Heater Blower Relay	Under right side of dash, on evaporator housing.
B+ Latch Relay	On relay block, on right wheelwell. See Fig. 1 .
Cooling Fan Relay (6-Cyl.)	On left fender panel (front of washer bottle).
Door Lock/Unlock Relays	Under dash, behind right kick panel.
Foglight Relay	Behind left headlight, on wheelwell.
Fuel Pump Relay	On relay block, on right wheelwell. See Fig. 1 .
Hazard Flasher Relay	On bottom of fuse block. See Fig. 2 .
Horn Relay	On bracket, above left kick panel. See Fig. 3 .
Idle-Up RPM Relay (1990)	In right side of engine bay, near battery.
Manifold Heater Relay (4.2L) (1990)	In right side of engine bay, near battery.
Oxygen Sensor Heater Relay	On relay block, on right wheelwell. See Fig. 1 .
Power Antenna Relay	Under right side of dash, behind glove box.
Rear Window Defogger Relay	Under instrument panel, to right of steering column. See Fig. 3 .
Rear Wiper Relay	In tailgate, next to wiper motor.
Starter Relay	In left side of engine bay, near battery. See Fig. 1 .
Trailer Towing Relays
Brake Lights	Behind left rear quarter trim panel.
Left & Right Turn Signals	Behind left rear quarter trim panel.
Turn Signal Flasher Relay	At top left of fuse block. See Fig. 2 .

Jeep Cherokee 1990 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Circuit Breakers	In fuse block.
Cruise Control In-Line Fuse	In harness, next to cruise control module.
ECAT In-Line Fuse	In harness, next to ECAT module.
Fuse Block	Under left side of dash. See Fig. 2 .
Fusible Links	At starter relay.

Jeep Cherokee 1990 CONTROL UNITS LOCATION

Component	Location
Anti-Lock Brake (ABS) Module	Behind rear seat.
Chime Module	On top of fuse block. See Fig. 2 .
Cruise Control Module	Under dash, above brake pedal.
Daytime Running Lights Module (1990)	In engine bay, on top of left wheelwell.
ECAT Module	Behind right side of dash.
Electronic Control Unit (ECU)	Behind left side of dash, above gas pedal.
Headlight Delay Module	Under left side of dash, above intermittent wiper module. See Fig. 3 .
Ignition Control Module	On right wheelwell, in front of relay block. See Fig. 1 .
Intermittent Wiper Module	Under left side of dash, to right of fuse block. See Fig. 3 .
Keyless Entry Module	Between sun visors.
Maintenance Reminder Module	Under dash, to right of steering column. See Fig. 3 .
Transmission Control Unit (TCU)	Under dash on passenger's side.

Jeep Cherokee 1990 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Accumulator Sensor	On master cylinder, to right of reservoir.
ABS Wheel Sensors	At each wheel.
Brake Fluid Level Sensor	In master cylinder reservoir.
Brake Pad Wear Sensors	In both inner front brake pads.
Coolant Temperature Sending Unit
4-Cyl.	At rear of cylinder head. See Fig. 4 .
6-Cyl.	At top front of cylinder head.
Coolant Temperature Sensor
4-Cyl.	In left rear side of intake manifold. See Fig. 5 .
6-Cyl.	Right side of engine block, near motor mount.
ECAT/ECU Throttle Position Sensor (TPS)	On throttle body. See Fig. 5 .
Engine Speed Sensor	On left side of bellhousing. See Fig. 6 .
Fuel Gauge Sending Unit	In fuel tank.
Knock Sensor	On lower front of engine block.
Manifold Absolute Pressure (MAP) Sensor	In engine bay, on right side of firewall.
Manifold Air Temp. (MAT) Sensor	At rear of intake manifold. See Fig. 5 .
Oil Pressure Sending Unit	On right side of engine block.
Oxygen Sensor	In exhaust manifold, near exhaust pipe flange. See Fig. 5 .
Throttle Position Sensor (1990)	On throttle body.
Vehicle Speed Sensor	At instrument cluster, in speedometer cable.

Jeep Cherokee 1990 MOTORS LOCATION

Component	Location
A/C-Heater Blower Motor	In evaporator housing.
Anti-Lock Brake (ABS) Pump Motor	At rear corner of engine bay.
Idle Speed Actuator (ISA) Motor	On right side of throttle body.
Power Door Lock Motor	Behind trim panel, in each door.
Power Window Motor	Behind trim panel, in center of each door.
Rear Washer Motor	In left front corner of engine bay.
Rear Wiper Motor	Behind trim panel, in upper center of tailgate.
Windshield Washer Motor	On windshield washer reservoir.
Windshield Wiper Motor	Behind left side of firewall.

Jeep Cherokee 1990 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
ECAT Solenoids	On valve body, in transmission.
EGR/EVAP Solenoid	On right side of engine bay, near battery.

Jeep Cherokee 1990 SWITCHES LOCATION

Component	Location
A/C Low Pressure Switch	On receiver-drier.
Back-Up/Neutral Switch	On left side of transmission case.
Brake Light Switch	On brake pedal bracket.
Brake Warning Switch	On brake pressure differential valve, below master cylinder.
Closed Throttle (Idle) Switch	An integral part of ISA motor.
Command Track Switch	On left side of transmission.
Cooling Fan Switch (6-Cyl.)	In left side of radiator.
Cruise Control Cancel Switch	On brake pedal bracket, above brake light switch.
Parking Brake Switch	Under center console, at base of parking brake lever.
Power Steering Switch (6-Cyl.)	On left side of power steering pump, in pressure hose.
Seat Belt Switch	In driver's seat belt.
Wide Open Throttle (WOT) Switch	On bracket, with ISA motor.

Jeep Cherokee 1990 MISCELLANEOUS LOCATION

Component	Location
A/C Clutch Diode	On A/C compressor.
A/C-Heater Blower Motor Resistor	Under right side of dash, on evaporator housing.
A/C Thermostat	Under right side of dash, on evaporator housing.
Cooling Fan Diode	Under left hand hood latch.
Diagnostic Connectors (D1 & D2)	On right wheelwell, behind relay block.
Emission Timer (1990)	Under right side of dash, left of blower motor.
Fuel Pump Ballast Resistor (6-Cyl.)	At front of left fender panel.