Circuit Operation

With the Headlamp Switch in HEAD and the Fog Lamp Switch ON, battery voltage is supplied to the Fog LPS Relay coil through CKT 317. The coil is grounded through the HI Beam filaments through CKT 11. The relay energizes and applies voltage to the Fog Lamps through CKT 34. The Fog lamps glow. Since the coil of the Fog LPS Relay is grounded through the HI Beam filaments, the relay will de-energize any time the HI Beams are on because voltage is applied to both sides of the relay coil. With the Headlamp Switch OFF and in low light conditions the DRL module will apply voltage through CKT 9 to the Fog lamp Switch.