Have Ford Questions? Ask a Mechanic for Answers ASAP
Hello, Eddie here and I will try to help. It very well could be a fuse issue, there are a few fuses on the central junction box that need checking first. Do you know where the interior fuse panel is on the passenger side up under the dash?
Alright, do you have the owners manual in the truck by chance?
alright, page 227 gives you a breakdown of the interior fuse panel and the fuse numbers, I would like for you to check fuse number 10, it is a yellow 20 amp fuse, that powers the trailer park lamp relay, and if that fuse is good, I want to swap the relay next. Are you working on it now?
Let me know if you find anything there with the fuse, the parking lights work on the truck correct?
No problem, We can try it in the AM. Thank you.
Hello, can you swap that trailer lamp relay? Im thinking its position 201, but Im only on cell service right now, you have the owners manual and looking at the diagram of the interior fuse panel?
look at the delay relay, swap it if it is identical, should be a part number on the trailer tow lamp relay, I want you to swap it with an identical relay in the fuse panel if possible, your sure this trailer isnt the issue right? Could you plug it into another truck just to be sure the running lights do work?
Sounds good, let me know what happens. thanks, ill be home later and I can pull the wiring diagram if needed.
I'm back home now. Any luck with it?
Alright, good deal, so the problem is in the truck, Swap that trailer running lamp relay in the interior fuse box with another one if you can, and if that isn't it, be sure check all the fuses out under the hood as well. Test light works well for testing them you can just touch each side of the fuse blade and if the light comes on, you know the fuse is good. I believe you'll find your problem either in the running light relay, or that connection between hitch socket and trailer. Let me know if you have any further questions. Thank you.