For the 1999 Ford F-150, the low-beam and high-beam headlights both use a 9007 bulb. The supplied fitment data does not indicate a separate bulb for different headlight types, so verify the original bulb before ordering if your truck has a nonstandard headlamp assembly.
- Lightning fog lights use either an H3 or H3C bulb; compare the existing bulb and socket before replacement.
- Front turn signals and parking lights use 3157A, while the front side marker uses 916NA.
- Rear brake and tail lights use 3157R; the rear turn signal uses 3157, and the reverse light uses 3156.
- The center stop light uses 912. License plate lighting may use 194 or 7441, so compare the original bulb.
- Interior fitment includes 168 or 917 for courtesy and interior lights. Dome lighting may use 578 or 912; compare the original bulb.