Checking Speed Control Operation
SYMPTOMCHECKING SPEED CONTROL OPERATION
POSSIBLE CAUSES
- Brake switch defective
- Ground circuit open
- S/C brake switch output circuit shorted to ground
- Speed control brake switch output supply ckt open
- Speed control on/off/set switch defective
- Speed control power supply circuit open
- Speed control power supply circuit shorted/ground
- Speed control servo connector observable defect
- Speed control switch defective
- Clock spring defective
- Speed control servo defective
- Speed control throttle cable defective
- Speed control vacuum supply leaks or restricted
- PCM defective (speed control operation)
- Vacuum reservoir defective