I was driving the truck the other night and realized I had no rear lights on either side. The lights work when braking, using turn signals, and the reverse lights on both sides. I changed out the bulbs and had the same problem. Would this be a wire issue, or a fuse issue, or something more major? If so where do I get the info on which fuse. Hoping it is an easy fix.

 

some ideas here....

https://www.ford-trucks.com/forums/1...il-lights.html

 

It would also help to know year and engine...

Do you have power AT the sockets? Have you checked the fuses?

 

My bad. it is a 2016 with the 6.2. The sockets have power, the lights work when I use the brakes and turn signals. They just aren't coming on with the headlights. I will check the fuses tomorrow. I need to figure out which fuse it is though.

 

If you have power (at the CORRECT pin) and ground at the light sockets, then you should have light assuming the bulbs are good. The brake/turn signals are a separate circuit from the running lamps on the supply side.

Go back and confirm your observations.

If the rest of the running lamps work properly, then it cannot be a fuse issue.