Fog Lamps

Fog Lamp operation is possible with the Headlamp Switch in the PARK or HEAD position, but if the Headlamp Switch is in the HEAD position the Fog Lamps are only operational if the Headlamp Dimmer Switch is in the LO position.

With the Headlamp Switch in the PARK or HEAD position (if in the HEAD position, Headlamp Dimmer Switch must he in LO position) voltage is applied through the closed contacts of the Headlamp Switch to the Fog Lamp Switch. With the Fog Lamp Switch in the ON position, voltage is applied through the closed contacts of the Fog Lamp Switch to the coil of the Fog Lamp Relay. Voltage is applied to the contact side of the relay through the DRL-FOG FUSE. Ground is supplied to the coil of the Fog Lamp Relay through the High Beam Filaments in the Headlamps and the High Beam Indicator (only if the Headlamp Dimmer Switch is in the LO position). With both power and ground applied to the coil of the Fog Lamp Relay, the relay energizes and voltage is applied through the closed contacts of the relay to the Fog Lamp ON indicator, the LH Fog Lamp and the RH Fog Lamp. With both power and ground applied to the Fog Lamp ON indicator, the LH Fog Lamp and the RH Fog Lamp, they light. If the Headlamp Switch is in the HEAD position, the Fog Lamp Switch in the ON position and the Headlamp Dimmer Switch is moved from the LO to the HI position, then positive (+) battery voltage is applied to the ground side of the Fog Lamp Relay. This will de-energize the Fog Lamp Relay causing the contacts to open, thus eliminating the flow of current to the Fog Lamps and the Fog Lamp ON indicator.