Brake Lamp: Description and Operation

The stoplamp switch is located under the instrument panel directly above the brake pedal. Whenever the brake pedal is pressed, one set of stoplamp switch contacts close and a voltage signal is provided to the cruise control module. The cruise control module disengages cruise control system operation as soon as this voltage signal is sensed.

When the brake pedal is pressed, another set of stoplamp switch contacts open, and the voltage circuit from the cruise control module to the magnetic clutch inside the actuator is interrupted. With voltage removed from the magnetic clutch, the actuators DC servo motor is disengaged from the worm gear and the throttle is permitted to return to the idle position. This feature is provided to ensure the cancellation of cruise control system operation during vehicle braking.