Without Daytime Running Light

With the Ignition Switch in RUN, voltage is supplied to the FOG Fuse. When the Fog Light Switch is closed, current flows to the Fog Light Relay.

If the Headlight Dimmer Switch is in LO, the Fog Light Relay coil is grounded through the HI Beam Headlights. The relay contacts close and voltage is applied to the Fog Lights. Voltage is also applied to the Park Lights. If the Headlight Dimmer Switch is in HI, voltage is applied to the previously grounded side of the relay coil. The coil is de-energized, and the Fog Lights go out.