Fog Lamps

Fog Lamps

Overview

The fog lamp system consists of:

- Fog lamps

- Headlamp switch (integrated into the FLM (Front Lighting Control Module))

- BCM (Body Control Module)

The fog lamps can be turned on when the ignition is in RUN or ACCESSORY, the parking lamps are on, and the high beams are off.

The fog lamp switch is integrated into the FLM (Front Lighting Control Module).

System Operation

System Diagram





Network Message Chart

BCM (Body Control Module) Network Input Messages






Fog Lamps

The FLM (Front Lighting Control Module) monitors the fog lamp switch and sends a headlamp switch status message over the communication network to the BCM (Body Control Module) to indicate the fog lamp request.

When the BCM (Body Control Module) receives an input from the FLM (Front Lighting Control Module) indicating a request for the fog lamps, the BCM (Body Control Module) provides ground to the fog lamp relay (integrated into the BCM (Body Control Module)). When the fog lamp relay is energized, voltage is routed to the fog lamps.