For the 2014 Ford F-250, the low-beam and high-beam headlights both use H13 bulbs. This shared fitment simplifies replacement, but confirm the bulb type on the vehicle before ordering if the headlamp assembly has been changed from its original configuration.
The fog lights use 9145 LED bulbs. Exterior lighting uses several 3157 applications: front and rear turn signals, brake lights, parking lights, side markers, and tail lights. The front side marker uses a 2825 bulb, while the reverse lights use 921 bulbs and the license plate lights use 194 bulbs.
Interior and service-area lighting includes 194 courtesy bulbs, 578 dome bulbs, 906 engine and map-light bulbs, a 161 glove-box bulb, and a 912 trunk-light bulb. Check the old bulb and socket when replacing less common interior or utility lights.