Are you asking how to replace the entire headlight assembly -OR- how to replace just the headlight bulb? Just the bulb.
autozone.com repair info
There are 4 screws that hold it on.
How do you replace a 1999 Ford Escort headlight bulb?"
To replace the headlight bulb on a 2008 Ford Focus, first, ensure the vehicle is off and the keys are removed. Open the hood and locate the back of the headlight assembly. Disconnect the electrical connector, then twist the old bulb counterclockwise to remove it. Insert the new bulb by twisting it clockwise, reconnect the electrical connector, and test the headlight before closing the hood.
Use a vanity mirror and a torch so you see what you are doing.
How do you replace a 1999 Ford Escort headlight - could use a picture.
The best way it to take your Ford Explorer to the nearest Ford Dealer. He will doubtless employ mechanics who will be glad to replace the headlight assembly.
You can not replace it unless it's an old ford focus.
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On the left, by the left headlight.
There are 4 little screws around headlight, remove then unplug and replace. Vdubwizard