Circuit Operation

CIRCUIT OPERATION
The horn system is powered by a 15 Amp fuse located in the Power Distribution Center (PDC) which is HOT at all times on circuit F31. This circuit supplies voltage to the coil and contact side of the horn relay.

When the operator presses the horn switch, a ground path is completed on the coil side of the horn relay through the switch. The horn relay, located in the PDC, then CLOSES the relay contacts. Voltage is passed through the CLOSED relay contacts on circuit X2 to the horn. Grounding for the horn is on the Z1 circuit to the left headlamp ground which is located on the left side of the radiator closure panel.

On vehicles equipped with Remote Keyless Entry (RKE), the X3 circuit also connects to the RKE module. This connection allows the RKE module to chirp the horn when a valid lock signal is received from the transmitter.