Fog/Driving Lamp: Description and Operation

CIRCUIT OPERATION
With the Headlight Switch in "PARK" or "HEAD" and the Fog Light Switch "ON," battery voltage is supplied to the fog lamp relay coil. The coil is grounded through the HI beam filaments. The relay energizes and applies voltage to the Fog Lamps. The Fog Lamps glow. Since the coil of the fog lamp relay is grounded through the HI Beam filaments, the relay will de-energized any time the HI Beams are on because voltage is applied to both sides of the relay coil.