Theory Of Operation
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Doors: After receiving the appropriate Door Lock/Unlock request over the communication network, the Body Control Module (BCM) controls an internal relay to provide voltage to the Door Lock/Unlock Motors (integral to the Door Latch) on the Door Lock Relay Control circuit or the Door Unlock Relay Control circuit.
RamBox and Tailgate: After receiving the appropriate Tailgate Lock/Unlock request over the communication network, the Body Control Module (BCM) controls an internal relay to provide voltage to the RamBox and Tailgate Release Lock/Unlock Motors (integral to the Latch) on the Secondary Lock Driver circuit or the Secondary Unlock Driver circuit.