Circuit Description
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls the locking function of the door locks in parallel with the door lock switches. The ground is applied to the door lock actuator lock control circuit through the door unlock portion of the door lock/unlock relay. When the BCM applies power to the door lock relay control circuit, the door lock portion of the door lock/unlock relay switches battery positive voltage to the door lock actuator lock control circuit, energizing all of the door lock actuators to lock.