Symptom Chart

Condition	Possible Sources	Action
No communication with the speed control actuator	Circuitry Speed control actuator	REFER to MODULE COMMUNICATIONS NETWORK article.
The speed control is inoperative - unable to enter self-test	Speed control actuator	Go to Pinpoint Test A .
The speed control is inoperative - no DTCs	Circuitry Speed control cable Speed control deactivator switch Clockspring Horn switch harness Speed control switch Speed control actuator SJB	Go to Pinpoint Test B .
The set speed fluctuates	Throttle lever Speed control cable Speed control actuator Anti-lock brake system (ABS) module	Go to Pinpoint Test C .
The speed control does not disengage when the brakes are applied	Circuitry Stoplamp switch Speed control deactivator switch Speed control actuator Bussed electrical center (BEC)	Go to Pinpoint Test D .
The speed control switch is inoperative	Circuitry Horn switch wiring harness Speed control switch Clockspring Speed control actuator	Go to Pinpoint Test E .
The speed control indicator lamp is always on	Speed control actuator Instrument cluster	Go to Pinpoint Test F .
The speed control indicator lamp is inoperative	Circuitry Speed control actuator Instrument cluster	REFER to INSTRUMENT CLUSTER article to continue diagnosis of the speed control indicator lamp.