Fog/Driving Lamp: Description and Operation

FRONT FOG LAMPS
Ground is applied at all times from G201 to the front fog lamp switch inside of the multifunction switch. When the front fog lamp switch is placed in the ON position, a ground is applied through the front fog lamp switch signal circuit to the BCM. The BCM then applies battery positive voltage through the front fog lamp relay control circuit to the coil side of the fog lamp relay. Battery positive voltage is applied at times from the FOG LP Fuse to the switch side of the fog lamp relay. When the relay is activated it closes the switch and allows battery positive voltage to be applied from the FOG LP Fuse, through the relay, to the front fog lamps. The ground for the front fog lamps is applied at all times from G102 for the left fog lamp and G101 for the right fog lamp.

REAR FOG LAMPS
Ground is applied at all times from G201 to the rear fog lamp switch inside of the multifunction switch. When the rear fog lamp switch is placed in the ON position, a ground is applied through the rear fog lamp switch signal circuit to the BCM. Battery positive voltage is applied at all times from the REAR FOG/ALDL/TOP SW fuse to the BCM. The BCM then applies a battery positive voltage through the rear fog lamp relay control circuit to activate the rear fog lamp relay in the underhood electrical center. When the relay is activated it closes the switch and allows battery positive voltage to be applied from the RR FOG/ALDL/TOP SW Fuse, through the relay, to the rear fog lamps. The ground for the rear fog lamps is applied at all times from G301.