Cruise Control System - Non EEC: Testing: Amplifier
- Make tests at amplifier 6-pin connector. Turn ignition on and connect voltmeter between White/Purple wire and ground in connector. Battery voltage should be present. If not, check for blown fuse.
- Connect voltmeter to Light Blue/Black wire and ground. With ON button in steering wheel depressed, battery voltage should be present. If not, perform control switch test.
- Release ON button. Voltmeter should read 7.8 volts. If not, check system ground, wiring, fuse and circuit breaker. Install a known good amplifier and recheck, if necessary.
- Depress OFF button. Voltage should drop to zero. If not, perform control switch test. Install a known good amplifier and recheck, if necessary.
- Depress and hold SET-ACCEL button. Voltmeter should read 4.5 volts. Rotate steering wheel several times. If voltage varies more than 0.5 volts, perform control switch test.
- Depress and hold COAST button. Voltage should be 1.5 volts. Depress and hold RESUME button. Voltage should be 6.5 volts. If all readings are correct, perform servo assembly test.