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)

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Brake On/Off Switch

PURPOSE
The brake on/off switch sends a signal to the Powertrain Control Module (PCM) to disengage the torque converter clutch when the brake pedal is depressed. This signal may be ignored by the PCM if the throttle position signal is above closed throttle.

It also deactivates the speed control system when the brake pedal is depressed, and signals the anti-lock brake system module that a braking condition is about to occur.