For vehicles with headlamp washers they clear debris from the headlamp lenses.

The headlamp washers are beneath the headlamps.

Press the washer button at the end of the windshield wiper lever to wash the headlamps. Both the headlamps and the windshield will be washed. After the first wash, the headlamps will not be washed until the fifth press of the windshield washer button.

The headlamps must be on to be washed. If the headlamps are off, only the windshield will be washed when the washer button is pressed.

If the washer fluid is low, the headlamp washers will not work.

See Windshield Wiper/Washer for more information.