Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The K9 Body Control Module provides the control circuit 3266 and control circuit 2679 with voltage and ground to the appropriate lock and unlock control circuits of the door latches. The unlock control circuit of the left rear and driver door latches share a common control circuit 2679. Transitioning of the lock actuators to the lock or unlocked position depends upon which control circuits receive voltage and which control circuits receive ground.