Fog/Driving Lamp: Description and Operation

The Tail LPS fuse in the IP fuse block, supplies battery positive voltage to the headlamp switch. The headlamp supplies battery positive voltage to both the fog lamp switch and the fog lamp relay switch contacts, when in the park or head positions. When the fog lamp switch closes, it supplies battery positive voltage to the coil side of the fog lamp relay. When the fog lamp relay closes, it supplies battery positive voltage to either fog lamp. The current flow is now from the fog lamp relay to both front fog lamps and to ground G 105 and G 106. The state of the fog lamps either ON or OFF will remain the same until the front fog lamp switch is pressed again, or the ignition switch is cycled OFF and ON. 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.

The rear fog lamps are controlled in much the same way, however the front fog lamps must be on in order to turn on the rear fog lamps. The rear fog lamps have there own relay, and both the relay control and current flow are the same.