Cruise Control/Shift Lock

Circuit Description
Power to the cruise control and shift lock systems is supplied via fuse #12 (S12) on the main fuse/relay panel. The cruise control unit modulates the vacuum control motor to control vacuum and throttle position based on input from thecruise control switch, the brake light switch and the speedometer. A vacuum vent valve at the brake pedal vents the vacuum in the system and signals the cruise control unit to deactivate the vacuum control motor.

On 1988 models, the shift lock function is provided by the park position clutch, controlled by the gear selector switch and the brake light switch. The shift lock will lock the gear selector lever in the Park position until the driver steps on the brake.


WARNING: The driver-side airbag is an explosive device. Before removing the steering wheel or steering column switches, always disconnect the airbag power-supply connector.