Principles of Operation: Notes
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The Body Control Module (BCM) controls various systems by monitoring inputs from switches, sensors and messages sent from other modules. Based on the inputs received, the BCM activates outputs. For example, the SCCM monitors the headlamp switch and transmits the headlamp switch position to the BCM over the network. Based on this input, the BCM may provide voltage to the exterior lamps.