Test A

PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE

Test A1:

Test A1-A3:

Test A4-A6:

Test A6-A7:

Test A8:

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.
- circuit 151 (LB/BK) open, shorted to power or shorted to ground
- circuit 848 (DG/OG) open, shorted to power or shorted to ground
- clockspring
- PCM
- speed control switch