Operation CHARM: Car repair manuals for everyone.

Remote Alarm

When pressing the panic button on the keyless entry transmitter, the RCDLR send a message to the BCM on the keyless entry communication link to flash the headlamps and sound the horn alternately for two minutes. The BCM switches ground on and off to the horn relay control circuit. The horn relay will turn on an off making the horns turn on and off. The BCM also switches ground on and off to the headlamp relay control circuit. The Headlamp relay will turn on and off making the headlamps turn on and off.