Normal Operation

The powertrain control module (PCM) sends a signal through circuit 848 (DG/OG) to the speed control switches which passes through the clockspring. The return signal is sent through circuit 151 (LB/BK) and the clockspring.

Possible Causes

• Circuit 151 (LB/BK) open, short to voltage or ground
• Circuit 848 (DG/OG) open or short to voltage
• Clockspring
• Speed control switch
• PCM