Ford fog lamp bulbs need to be checked every 6 months to make sure that they are functioning properly. When you notice that one of the bulbs is out, replace it right away. Replacement bulbs can be purchased from any auto parts store. To get the proper new fog lamp bulbs, you'll need the part number on the base of the old bulb.
Open the hood and remove the electrical plug from the back of the fog light ballast below the headlight assembly.
Turn the fog lamp counterclockwise to unlock it from the fog light housing.
Insert the new fog lamp. Align the notches on the fog lamp housing with the tabs on the new bulb and turn the bulb clockwise to lock it into the housing.
Reconnect the fog lamp electrical plug.
