Theory Of Operation
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Body Control Module (BCM) provides a battery voltage output to certain low-level lighting output lamps through the ambient lamp driver circuit. These lamps use a dedicated path to ground for illumination. For additional information on the operation of the lamps. Refer to OPERATION .