Front Fog Lamps
The front fog lamps have a path to ground at all times through their connection to the headlight and dash wire harness. The engine compartment wire harness has takeouts with eyelet terminals that are secured by screws to the front end sheet metal within the engine compartment. The BCM monitors a hardwired input from the fog lamp switch in the lower instrument panel switch pod to determine whether the front fog lamps are selected. If the front fog lamps are selected and the left (lighting) multi-function switch inputs indicate the headlight low beams are ON, the BCM energizes a high side driver, which provides battery voltage to the front fog lamps through the right and left front fog lamp feed circuits.
The BCM also sends the appropriate electronic messages to the Instrument Panel Cluster (IPC) over the CAN data bus to illuminate or extinguish the front fog lamp indicator. The BCM will automatically de-energize the front fog lamps any time the headlights are turned OFF or the headlight high beams are selected.
Each front fog lamp includes an integral adjustment screw to be used for static aiming of the fog lamp beams.