Theory Of Operation
WARNING: This page is about a different car, the 2014 Fiat 500e. However, it is still accessible from the selected car via links, so may be relevant.
The BCM receives a communication network message to indicate that the vehicle is in reverse. Once the BCM is informed that the vehicle is in reverse, it provides a voltage output through the backup lamp driver circuit. The same BCM driver circuit connects to both the Left and Right Backup Lamps. A ground path for the lamps is present through the harness to the body sheet metal. For additional information on the Backup Lamps operation, refer to OPERATION .