The FOG LP relay in the underhood accessory wiring junction block controls the fog lamps. The coil side of the FOG LP relay receives voltage at all times through circuit 1200 from the headlamps and HIGH beam indicator. The common terminal of the FOG LP relay switch receives power through circuit 9 from the FRT PARK LPS fuse in the fuse block. This fuse receives its power from the headlamp switch through circuit 74 when the headlamp switch is in the PARK or HEAD position. The headlamp switch receives power through circuit 1340 from the LP PARK fuse in the underhood accessory wiring junction block. When the fog lamp switch is set to the ON position, the Body Control Module (BCM) supplies a ground through circuit 192, the fog lamp switch, circuit 1317 and to FOG LP relay coil. This energizes the FOG LP relay, turning on the fog lamps by sending power to the normally open switch contact and circuit 34 to the fog lamps. Circuit 34 also supplies power to the indicator lamp in the fog lamp switch. The LH fog lamp receives ground from G101 through circuit 1350. The RH fog lamp receives ground from G102 through circuit 1250. The fog lamps will shut off when the headlamp dimmer switch is turned to Flash-To-Pass (FTP) or if the headlamp switch is in HEAD and the headlamp dimmer switch is set to HIGH.