Brake Light Switch: Description and Operation
STOP LAMP SWITCHThe stop lamp switch is under the instrument panel, directly above the brake pedal. When you press the brake pedal, 1 set of the stop lamp switch contacts close. The closed contacts provide a voltage signal to the cruise control servo assembly. The cruise control servo assembly disengages the cruise control operation as soon as the voltage signal is sensed.
When you press the brake pedal, another set of stop lamp switch contacts open. The open contacts interrupts the voltage circuit from the cruise control servo assembly to the magnetic clutch, inside the assembly. With the voltage removed from the magnetic clutch, the actuator DC servo disengages from the worm gear. This action permits the throttle to return to the idle position. This ensures the cancellation of the cruise control operation during vehicle braking.