Chevrolet 1993 Astro Passenger Owner's Manual page 98

Features & Contmls
PO396
Use your optional fog lamps for better vision in foggy or misty conditions.
Your parking lights and/or low beam headlights must be on or your fog lamps
won't work.
Your fog lamp switch is in the center of the instrument panel above the radio.
Slide the right side of the switch to turn the fog lamps on, and the left side
of the switch to turn them off. A warning light in the switch will remind you
that your fog lights are on.
Remember, fog lamps alone will not give off as much light as your headlights.
Never use your fog lamps in the dark without turning on your headlights.
Fog lamps will go off whenever your high beam lights come on. When the
high beams go
off,
the fog lamps will come on again.
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