Principles of Operation
PRINCIPLES OF OPERATIONWhen the horn switch is pressed, circuit 1 (DB) grounds the smart junction box (SJB). The SJB then grounds the horn relay control circuit 1323 (OG/RD). This energizes the horn relay, allowing battery voltage to flow through the horn relay to the horn through circuit 6 (YE/LG), enabling the horn to sound. When the vehicle security system is armed, the SJB provides a momentary ground to the horn relay control circuit 1323 (OG/RD) to indicate the system is armed, and a continuous ground when an intrusion is detected or the panic alarm is activated.