Reversing Lamps
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The reversing lamps are controlled by the SJB and the powertrain control module (PCM). The PCM sends a message through the SCP communication network to the SJB indicating the transmission is in REVERSE. The SJB processes this information and outputs the command to the reversing lamps which are hard-wired to the SJB.