Where is the trailer running lights fuse located in ford F-150?

The location of the trailer running lights fuse in a Ford F-150 varies depending on the year and model. There isn't one single location. It's also possible that the trailer running lights might be controlled by a relay, rather than a fuse directly.

To find it, you need to consult your owner's manual. The manual will have a fuse box diagram specifically for your truck's year and model, clearly showing the location of all fuses and relays, including the one for the trailer lights.

If you don't have the owner's manual, you can usually find a digital version online through the Ford website, by searching for your vehicle's year, make, and model.