Principles of Operation

All parking, rear, license plate, and marker lamps are controlled by the smart junction box (SJB). The headlamp switch is hard-wired to the SJB. When the headlamp switch is in the HEADLAMPS ON or PARKING LAMPS ON position, the SJB processes this information and outputs the appropriate command to the parking and license plate lamps, which are hard-wired to the SJB. Only the left and right rear lamps provide lamp outage indication. Fault management of the parking lamps provides rear parking lamp functionality in the event of certain multifunction switch, headlamp switch, ignition switch or SJB failures.