Test B: Set Speed Fluctuates
- Ensure ignition is off. Disengage speed control servo/actuator cable from servo/actuator. Inspect cable by pulling end of cable and observing throttle movement. If cable is okay, go to next step. Replace cable if broken or binding and retest system operation.
- Drive vehicle and observe speedometer operation without using speed control. If speedometer needle fluctuates, repair speedometer as necessary. See ANALOG INSTRUMENT PANELS - ECONOLINE article. If speedometer needle does not fluctuate, replace speed control servo/actuator and retest system operation.