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) receives the input from the headlamp switch requesting low beam lamp illumination. The BCM provides a voltage output through the low beam driver circuit. For additional information on the Headlamp operation. Refer to OPERATION .