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Cruise Control Components: Amplifier

  1. 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.
  2. 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.
  3. 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.
  4. Depress "OFF" button. Voltage should drop to zero. If not, perform control switch test. Install a known good amplifier and recheck, if necessary.
  5. 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.
  6. 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.
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