Component Diagnosis and Testing
SHIFT SWITCHRefer to Starting System for shift switch replacement procedure. Starting System
VEHICLE SPEED SENSOR
1. Disconnect battery ground cable.
2. Remove combination meter from instrument panel.
Fig. 17 Vehicle Speed Sensor Continuity Test:
3. Check continuity between speed sensor and ground, Fig. 17.
4. Four pulses should occur within one complete revolution of flat on speedometer cable.
5. If defective replace speed sensor.
CRUISE MAIN SWITCH
Fig. 7 Cruise Control Unit Resistance Test.:
1. Connect 12 volts battery positive power to terminal 3 of cruise main switch and negative to terminal 5, Fig. 18.
2. Connect positive terminal of circuit tester to terminal 1 and negative to terminal 5.
3. Turn cruise switch, circuit tester should read 10-14 volts.
4. Push switch Off, voltage should read zero volts.
5. If not replace cruise main switch.
BRAKE LIGHT SWITCH
1. Disconnect brake light switch electrical connector, then remove switch from pedal bracket.
Fig. 19 Brake Switch Test:
2. Using an ohmmeter check switch for continuity, Fig. 19, if defective then replace switch.
3. After installing brake switch, refer to Brake Switch (Cruise Control) for adjustment procedure. Adjustments
ACTUATOR
Fig. 11 Cruise Control Servo Connector Terminal Identification (Part 1 Of 2).:
Fig. 11 Cruise Control Servo Connector Terminal Identification (Part 2 Of 2).:
1. With engine in the Off position, pull wiring harness terminals from connector by unlocking terminal lock in connector, Fig. 20.
2. Disconnect cruise control actuator electrical connector.
3. Check for continuity between terminals 1 and 3, Fig. 20.
4. Resistance of clutch coil should read 15 ohms plus or minus 3 ohms.
Fig. 12 Servo Terminals 1, 2, 3, & 4 Location.:
5. Connect terminals 2 and 3 to battery positive and terminals 1 and 4 to ground, Fig. 21.
6. Ensure motor pulls cable actuating lever to the fully open position, Fig. 21.
7. Disconnect probe from terminal 3 ensuring cable returns quickly, allowing actuator lever to return to the fully closed position.
8. Connect battery positive to terminal 3 and battery ground to terminal 1.
9. Ensure clutch operation maintains actuator cable position at this time.
10. With actuator lever pulled by hand to its fully open position, connect terminal 3 and 4 to battery positive and terminals 1 and 2 to battery ground.
Fig. 13 Cruise Control Servo Fully Closed Position.:
11. Ensure cable is released by motor and actuator lever returns to fully closed position, Fig. 22.
12. If any of the preceding test failed, replace actuator.
13. Ensure terminals are properly secured in connector.
SET COAST/ACCEL RESUME/CANCEL SWITCH
1. Remove turn signal/dimmer switch assembly.
Fig. 14 Set Coast, Accel Resume & Cancel Switch Continuity Test.:
Fig. 15 Set Coast, Accel Resume & Cancel Switch Position Test.:
2. Using a suitable circuit tester, check continuity between terminals, Fig. 23, at each switch position, Fig. 24.
3. If any test result is not good, then replace turn signal/dimmer switch assembly.
CLUTCH PEDAL POSITION (CPP) SWITCH CIRCUIT
1. Disconnect CPP switch connector, then remove switch from pedal bracket.
2. Check continuity across switch terminals.
3. When switch is pushed in continuity should not exist.
4. When released switch should have continuity.