Circuit Description

The PARK LP fuse and the FOG LP fuse supply battery voltage to the headlamp switch and the fog lamp relay contacts. When the headlamp switch is in HEAD or PARK and the driver presses the fog lamp switch, voltage is applied to the fog lamp relay coil. The fog lamp relay coil is grounded through the high beam headlamp filaments. The relay energizes and applies voltage to the fog lamps through the fog lamps supply voltage circuit. Since the coil of the FOG LAMP relay is grounded through the high beam filaments, the relay will de-energize any time the high beams are ON. The fog lamps can also be activated with the headlamp switch OFF, during Daytime Running Lamp (DRL) night mode operation. When In night mode, the DRL control module applies voltage to the fog lamp switch and to the exterior lights.