Lumina APV V6-3800 3.8L (1994)
Fog/Driving Lamp: Description and Operation
FOG LAMPS
With the ignition Switch in "RUN," "BULB TEST" or "START," voltage is applied through the TURN B/U Fuse to the Fog Lamp Relay. The coil of
the Fog Lamp Relay receives voltage whenever the Headlamp Switch is in "PARK" or "HEAD" and is grounded through the HI Beam Headlamp
Filaments to ground G106 and G107. With both power and ground applied to the coil, its contacts close, thus providing voltage to the Fog Lamp
Switch. If the Fog Lamp Switch is "ON," voltage is applied to the Fog Lamps. The Fog Lamps are grounded to G106 and G107. With power and
ground applied, the Fog Lamps light. If the HI Beam Headlamps are turned "ON" with the Fog Lights "ON" the Fog Lights will go out. This is
because voltage is now being applied to the HI Beam Filaments.
