BUZZERS, RELAYS & TIMERS
| Component | Location | |
|---|---|---|
| A/C Clutch Control Relay | ||
| 2.5L (VIN A) | Far left side of firewall. (Scheme 1) | |
| 2.8L (VIN R) | Center of left side inner fender. (Scheme 2) | |
| 4.3L (VIN Z) | Far left side of firewall. (Scheme 3) | |
| A/C High Blower Relay | Between blower motor and A/C accumulator. | |
| Daytime Running Lights (DRL) Relay | On right side of steering column. | |
| Foglight Relay | Above interior fuse block. | |
| Fuel Pump Relay | ||
| 2.5L (VIN A) | On firewall, left of brake booster. (Scheme 1) | |
| 2.8L (VIN R) | On firewall, left of brake booster. (Scheme 2) | |
| 4.3L (VIN Z) | On firewall, left of brake booster. (Scheme 3) | |
| 4.3L HP (VIN W) | On firewall, left of brake booster. (Scheme 4) | |
| Hazard Flasher | ||
| Digital Cluster | On convenience center. | |
| Standard Cluster | On interior fuse block. | |
| Horn Relay | On convenience center. | |
| Power Door Lock Relay | On right side of steering column. | |
| Rear Window Defogger Relay | On right side of brake pedal support. | |
| Rear Window Release Relay | Near interior fuse block. | |
| Turn Signal Flasher | ||
| Digital Cluster | On fuse block. | |
| Standard Cluster | At convenience center. | |
| Variable Tuning Relay (4.3L HP) | On left side of firewall. | |
BUZZERS, RELAYS & TIMERS LOCATION
CIRCUIT PROTECTION DEVICES
| Component | Location | |
|---|---|---|
| Circuit Breakers | ||
| Power Accessories | At top of fuse block. | |
| Power Windows | At bottom of fuse block. | |
| Convenience Center | Left of steering column, at lower edge of dash. | |
| Fuse Block | ||
| 2.5L (VIN A) | Below left side of dash. (Scheme 1) | |
| 2.8L (VIN R) | Below left side of dash. (Scheme 2) | |
| 4.3L (VIN Z) | Below left side of dash. (Scheme 3) | |
| 4.3L HP (VIN W) | Below left side of dash. (Scheme 4) | |
| Fusible Links | ||
| Power Distribution (2.5L & 4.3L) | At rear of alternator (2 links). | |
| Power Distribution (2.8L) | At starter solenoid. | |
| Interior Lights In-line Fuse | On center of firewall. | |
CIRCUIT PROTECTION DEVICES LOCATION
CONTROL UNITS
| Component | Location | |
|---|---|---|
| ABS Module | ||
| Rear ABS (RABS) | Near master cylinder. | |
| 4WD ABS | On left front fender. | |
| Audio Alarm Module | On convenience center. | |
| Cruise Control Module | On left side of steering column. | |
| Daytime Running Lights (DRL) Module | Above interior fuse block. | |
| Diode Module | Above fuse block. | |
| Elapsed Timer Module (2.8L) | Under right side of dash, next to ECM. (Scheme 2) | |
| Electronic Control Module (ECM) | ||
| 2.5L (VIN A) | Under right side of dash. (Scheme 1) | |
| 2.8L (VIN R) | Under right side of dash. (Scheme 2) | |
| 4.3L (VIN Z) | Under right side of dash. (Scheme 3) | |
| 4.3L HP (VIN W) | Under right side of dash. (Scheme 4) | |
| Elec. Spark Control (ESC) Module | ||
| 2.8L (VIN R) | On center of firewall. (Scheme 2) | |
| 4.3L (VIN Z) | On center of firewall. (Scheme 3) | |
| 4.3L HP (VIN W) | On center of firewall. (Scheme 4) | |
| Elec. Spark Timing (EST) Module | At distributor. | |
| Elec. Transfer Case Module | Near ECM. | |
| Variable Tuning Controller (4.3L HP) | On top of intake manifold. | |
| Windshield Wiper Module | On center of firewall . | |
CONTROL UNITS LOCATION
SENDING UNITS & SENSORS
| Component | Location | |
|---|---|---|
| Coolant Temperature Sensor | ||
| 2.5L | On top rear of engine. (Scheme 1) | |
| 2.8L (VIN R) | On top front of engine. (Scheme 2) | |
| 4.3L (VIN Z) | On top front of engine. (Scheme 3) | |
| 4.3L HP | On lower right side of engine. (Scheme 4) | |
| Knock Sensor | ||
| 2.8L | On right side of engine. (Scheme 2) | |
| 4.3L | Near distributor. (Scheme 3) | |
| 4.3L HP | On lower left & on top rear of engine. (Scheme 4) | |
| Manifold Absolute Pressure (MAP) Sensor (Except 4.3L HP) | ||
| 2.5L (VIN A) | On top right side of engine. (Scheme 1) | |
| 2.8L (VIN R) | On top right side of engine. (Scheme 2) | |
| 4.3L (VIN Z) | On top right side of engine. (Scheme 3) | |
| 4.3L HP | Near A/C compressor. (Scheme 4) | |
| Manifold Air Temp. (MAT) Sensor | ||
| 2.5L (VIN A) | On right side of engine, near alternator. (Scheme 1) | |
| 4.3L HP (VIN W) | On right side of engine, near alternator. (Scheme 4) | |
| Throttle Position Sensor (TPS) | ||
| 2.5L (VIN A) | On throttle body assembly. (Scheme 1) | |
| 2.8L (VIN R) | On throttle body assembly. (Scheme 2) | |
| 4.3L (VIN Z) | On throttle body assembly. (Scheme 3) | |
| 4.3L HP (VIN W) | On throttle body assembly. (Scheme 4) | |
| Transfer Case Speed Sensor | On right rear of transfer case. | |
| Vehicle Speed Sensor (VSS) | ||
| 2.5L (VIN A) | On left rear of transmission. (Scheme 1) | |
| 2.8L (VIN R) | On left rear of transmission. (Scheme 2) | |
| 4.3L (VIN Z) | On left rear of transmission. (Scheme 3) | |
| 4.3L HP (VIN W) | On left rear of transmission. (Scheme 4) | |
SENDING UNITS & SENSORS LOCATION
MOTORS
| Component | Location | |
|---|---|---|
| A/C-Heater Blower Motor | In evaporator housing, in engine compartment. | |
| Idle Air Control (IAC) Motor | ||
| 2.5L (VIN A) | On throttle body. (Scheme 1) | |
| 2.8L (VIN R) | On throttle body. (Scheme 2) | |
| 4.3L (VIN Z) | On throttle body. (Scheme 3) | |
| 4.3L HP (VIN W) | On throttle body. (Scheme 5) | |
| Power Door Lock Motor | In bottom rear of each door. | |
| Power Window Motor | In each door. | |
| Windshield Washer Motor | On side of washer reservoir. | |
| Windshield Wiper Motor | On center of firewall. | |
MOTORS LOCATION
SOLENOIDS & SOLENOID VALVES
| Component | Location | |
|---|---|---|
| EGR Vacuum Solenoid | ||
| 2.5L | Near A/C compressor. (Scheme 1) | |
| 2.8L | Near distributor. (Scheme 2) | |
| Elec. Air Control (EAC) Sol. (2.8L) | On bracket, at right front of engine. (Scheme 2) | |
| Elec. Vacuum Regulator Valve (EVRV) (4.3L) | On right valve cover. | |
| Torque Converter Clutch Sol. (TCC) | On left side of transmission. | |
SOLENOIDS & SOLENOID VALVES LOCATION
SWITCHES
| Component | Location | |
|---|---|---|
| A/C Cycling Pressure Switch | On accumulator. | |
| A/C Low Charge Protection Switch | On rear of A/C compressor. | |
| Back-Up Light Switch | On left side of transmission. | |
| Brake Pressure Switch | On master cylinder. | |
| Brake/Stoplight Switch | On brake pedal support bracket. | |
| Brake/Cruise Switch | On brake pedal support bracket. | |
| Coolant Temperature Switch | ||
| 4.3L HP | Near A/C compressor. | |
| Except 4.3L HP | Lower right side of engine. | |
| Clutch/Cruise Switch | On clutch pedal support bracket. | |
| Front Axle Lock Switch | On front axle, near steering gear. | |
| Fuel Pump/Oil Pressure Switch | ||
| 4.3L HP | Near distributor. | |
| Except 4.3L HP | Near distributor. | |
| Neutral Safety Switch | On top of steering column. | |
| Oil Pressure Switch | ||
| 2.5L | On right rear of engine. (Scheme 1) | |
| 2.8L | On left side of engine. (Scheme 2) | |
| 4.3L (VIN Z) | On top rear of engine. (Scheme 3) | |
| 4.3L HP (VIN W) | On top rear of engine. (Scheme 4) | |
| Parking Brake Switch | On base of parking brake assembly. | |
| Power Steering Press. Switch (PSPS) | In power steering pressure hose, near steering gear. (Scheme 1) | |
| Starter Lock-Out Switch (M/T) | On clutch pedal bracket. | |
| Starter Lock-Out Switch (A/T) | Base of steering column. | |
| Transmission Position Switch | On steering column. | |
| 4WD Indicator Switch | On front drive axle. | |
SWITCHES LOCATION
MISCELLANEOUS
| Component | Location | |
|---|---|---|
| A/C-Heater Blower Motor Resistor | On blower motor housing. | |
| ALDL Diagnostic Connector | ||
| 2.5L (VIN A) | Under left side of dash, to right of steering column. (Scheme 1) | |
| 2.8L (VIN R) | Under left side of dash, to right of steering column. (Scheme 2) | |
| 4.3L (VIN Z) | Under left side of dash, to right of steering column. (Scheme 3) | |
| 4.3L HP (VIN W) | Under left side of dash, to right of steering column. (Scheme 4) | |
| Fuel Pump Prime/Test Connector | ||
| 2.5L (VIN A) | On center of firewall. (Scheme 1) | |
| 2.8L (VIN R) | On center of firewall. (Scheme 2) | |
| 4.3L (VIN Z) | On center of firewall. (Scheme 3) | |
| 4.3L HP (VIN W) | On center of firewall. (Scheme 4) | |
| Vehicle Speed Sensor Buffer | Near ECM. | |
MISCELLANEOUS LOCATION
COMPONENT LOCATION GRAPHICS
Note. Figures may show multiple component locations. Refer to appropriate table for proper figure references.
