Principles of Operation

PRINCIPLES OF OPERATION

NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).

The SJB monitors the input from the stoplamp switch. When the brake pedal is applied, voltage is routed to the SJB. The SJB then supplies voltage to the stoplamps.

On vehicles with combination rear stop/turn lamps, the turn and hazard lamp functions override the rear stoplamp function.