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

Alarm Module: Description and Operation

PURPOSE
The Anti-Theft Controller Module controls the vehicle antitheft system through inputs from door, hood, and shock sensors.

OPERATION
If the anti-theft system is triggered, the starter circuit will be disabled. The module monitors switches located throughout vehicle and if triggered, sounds horn and flashes headlamps and parking lamps at an intermittent rate of 80 cycles per minute. Also disables starting system until anti-theft is disarmed. Senses a 12V signal to arm or disarm the anti-theft system when doors are locked or unlocked by remote transmitter.