Fog/Driving Lamp: Description and Operation

FRONT FOG LAMPS
Ground is applied at all times at G201 to the front fog lamp switch inside of the turn signal/multifunction switch. When the front fog lamp switch is placed in the ON position, ground is applied through the front fog lamp switch signal circuit to the body control module (BCM). The BCM applies battery voltage through the front fog lamp relay control circuit to the coil side of the fog lamp relay. Battery voltage is applied at all times from the FOG LP fuse to the switch side of the fog lamp relay. When the relay is energized, the relay switch contacts close and allow battery voltage to be applied from the FOG LP fuse, through the relay switch contacts, to the front fog lamps. Ground for the front fog lamps is applied at all times at G101 for the left fog lamp and G102 for the right fog lamp. G102 also serves as ground for the coil side of the fog lamp relay.

REAR FOG LAMPS
Ground is applied at all times at G201 to the rear fog lamp switch inside of the turn signal/multifunction switch. When the rear fog lamp switch is placed in the ON position, ground is applied through the rear fog lamp switch signal circuit to the body control module (BCM). Battery voltage is applied at all times from the REAR FOG/ALDL TOP SW fuse to the BCM. The BCM applies battery voltage through the rear fog lamp relay control circuit to activate the rear fog lamp relay located in the I/P relay block. When the relay is activated, the switch closes and allows battery voltage to be applied from the RR FOG/ALDL TOP SW fuse, through the relay, to the rear fog lamps. Ground for the rear fog lamps is applied at all times at G302.