Test A: The Speed Control Is Inoperative
PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVEA1-A4:
A5-A6:
Normal Operation
The powertrain control module (PCM) sends a signal through circuit 151 (LB/BK) to the speed control switches which passes through the clockspring. The return signal is sent through circuit 848 (DG/OG) and the clockspring.
Possible Causes
- parking brake switch circuitry
- speed control switch
- digital transmission range (TR) sensor
- vehicle speed signal
- PCM