Power Door Locks

WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.

Regardless of the ignition switch position, the GEM is hot at all times. When the GEM receives a signal from the keyless entry remote transmitter or door lock control switch, the GEM supplies a ground signal to the appropriate lock or unlock relay. The ground signal closes the relay which supplies power to the door lock actuators. The door lock actuators will then actuate to a lock or unlock position determined by the relay power supplied on the lock or unlock circuit. The liftgate is also controlled by the GEM by sending a ground signal to the liftgate unlock relay. The liftgate unlock actuator is also hardwired to the liftgate relay. When the relay receives the ground signal from the GEM, it actuates the liftgate unlock actuator to the unlock position.