Fog/Driving Lamp: Description and Operation

FOG LAMPS

With the ignition switch in the ON position, the fog lights will illuminate when the driver presses the fog lamp switch. The fuse block - underhood supplies battery positive voltage to the switch circuit of the FOG LP relay. Ignition voltage is available to the FOG LP relay coil. The DIM controls the FOG LP relay coil. When the fog lamp switch is pressed ON, the front fog lamp switch signal of the HVAC control module with C67 or instrument panel module (IPM) with CJ2 has ground through the fog lamp switch. The control module sends a class 2 message to the DIM, which energizes the fog lamp relay control circuit of the FOG LP relay. When the DIM energizes the FOG LP relay, the current flows from the FOG LP relay switch to both front fog lamps. The front fog lamps have ground at G401. The state of the front fog lamps (on or off) will remain the same until the front fog lamp switch is pressed again, even between ignition cycles. The park lamps or low beam headlights must be ON in order for the fog lights to be illuminated. Fog lamp operation will be cancelled whenever the park lamps, are turned OFF or the high beam headlights have been selected.