I have an 05 f-150 I purchased this truck used and have a quick question, I hooked up my boat and tested the lights the brakes, left turn, right turn all work, but the running lights don't work, I tested the pins on the truck and the pin that controls the running lights is not hot when the lights are turned on. (Black w/ white line if i remember right) anyway, do any of you guys know what fuse controls that, my truck didn't come with a manual, and it would take me an eternity to pull all of them out and test them.

 

From my manual, an 05 too it says the relay R201 is the trailer tow park lamps and the fuse is location 10 with a 20 amp fuse. The description for the fuse says "trailer tow back-up lamps relay (pcb1), trailer tow parklamp relay (R201)" hope this solves your problems

 

Thanks I will check it tomorrow and let you know what I find.

 

Look here for a diagram....you need to scroll about half way down the page. Its from a 2006 but it matches my 2004, so it should work for your 05 also.

https://www.f150online.com/forums/sh...=184757&page=2