77 Speed Control Power Relay Circuit

NAME OF CODE:
Speed Control Power Relay Circuit

WHEN MONITORED:
With the ignition key ON, speed control switched ON, the SET button pressed and the brake pedal released.

SET CONDITION:
The speed control power supply circuit is either open or shorted to ground.

THEORY OF OPERATION:
The PCM monitors the voltage drop across all speed control solenoids and the power supply circuit.

POSSIBLE CAUSES:
- PCM misfire
- Open or shorted power supply circuit
- Failed dump solenoid (S/C servo)