Need help in locating the fuse that would control my trailer running lights. My trailer brake & turn signal lights work. When I connect my trailer to other trucks the running lights work. I assume this means I have a blown fuse that controls my trailers running lights as I've checked all wiring. Can anyone point me to the correct fuse. The truck is an 2008 F350 diesel that has two fuse boxes--one located inside the passenger side and the other under the hood.

 

Did you check your owners manual? They are identified in the manual. Also, you not only have fuses, but there are relays for all the trailer outputs.

 

I blew that fuse once too, i believe i found it in the manual.

 

Looks like fuse #42 (30A) and relay #55.

Under the hood.

 

I've looked in the manuel-- but it was no help although i did check various fuses but all were ok

 

Check that but no help-- I did check out various fuses but all were ok

 

I did not check the under the hood ones as they are difficult to access-- but I guess I'll try

 

You didn't think it would be easy, did ya?

All the trailer stuff is under the hood, I believe.

 

BTW, in your manual, look under Roadside Emergencies. That's where they list the fuses.

 

Well you oh son of a gun-- Thanks-- Found how to get to fuse #42 & sure enough it was blown-- changed it out and now my running lights work-- Thanks so much for your help!!!!!