Rear Fog Lamp

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The rear fog lamp has a path to ground at all times through a connection to the body wire harness. The body wire harness has takeouts with eyelet terminals that are secured by screws to the body sheet metal within the passenger compartment. The BCM monitors a hard wired input from the fog lamp switch in the lower instrument panel switch pod to determine whether the rear fog lamp is selected. If the rear fog lamp is selected the BCM energizes a relay in the Power Distribution Center (PDC) with a low side driver, which provides battery voltage to the rear fog lamp through the rear fog lamp feed circuit.

The BCM also sends the appropriate electronic messages to the Instrument Panel Cluster (IPC) over the CAN data bus to illuminate or extinguish the rear fog lamp indicator.