For 1990-2009 cars

The fog lamp button is located near the exterior lamps control.

: For vehicles with fog lamps, press to turn the fog lamps on or off. An indicator light will turn on in the button when the fog lamps are on. The parking lamps or low-beam headlamps must be on for the fog lamps to work. The fog lamps will go off whenever the high-beam headlamps come on. When the high beams go off, the fog lamps come on again.

Some localities have laws that require the headlamps to be on along with the fog lamps.