Principles of Operation

PRINCIPLES OF OPERATION

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

The battery junction box (BJB) supplies the control and switched voltage to the horn relay (part of the SJB). When the horn switches are pressed, ground is supplied through the clockspring to the horn relay. The horn relay is then energized, directing voltage to the horn. When the perimeter anti-theft system is armed, the SJB provides a momentary ground to the horn relay control side to indicate the system is armed, and an on and off ground when an intrusion is detected or the panic feature is activated.