Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Stoplamp Switch

The stoplamp switch is under the instrument panel, directly above the brake pedal. When you press the brake pedal, 1 set of the stoplamp 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 stoplamp 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.