Principles Of Operation

Horn

Principles of Operation

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The Battery Junction Box (BJB) supplies voltage to the horn relay (integrated into the SJB). When the horn switch (part of the steering wheel) is pressed, ground is supplied to the horn relay coil through the clockspring. The horn relay then energizes, sending voltage to the horn, enabling the horn to sound.

The SJB also provides ground to the horn relay coil to sound the horn when the anti-theft system is armed, an intrusion is detected or the panic button is pressed on the Remote Keyless Entry (RKE) transmitter, or to indicate a programming feature sequence.