For the 2003 Ford F-350, the headlight bulb depends on the truck’s headlamp configuration. Both the low beam and high beam use either a 9007 or H5054 bulb, so confirm the existing headlamp style before ordering. The fog lights are listed with two possible fitments: 9006 or 9145.
Several exterior signal and marker functions use the same bulb family. The front turn signal, parking light, brake light, tail light, and rear turn signal use 3157 bulbs. The front side marker uses 194, the reverse light uses 3156K, and the center stop light uses 922. The license plate and courtesy lights use 168.
- Dome light: 578 or 912
- Trunk light: 906
- Engine light: 912
- Glove box and ash lights: 161
- Instrument illumination: PC194