Hey fellas, been a million years since I posted. Got out of gen 6 fords for a while but now I'm back with a 77 f350 camper special. Setting up for gooseneck this weekend and had to make my own hitch (as is with everything on this truck). I decided to revisit my trailer wiring, since I am going to put a plug in the bed anyways, and I started testing at the factory 6 flat light plug that is placed about mid-ship on the frame. I have ground, right, left, tail, and then I should have 12+ and backup. I know my backup wiring is messed up at the trans, so that explains why that doesn't work, but I'm not getting the 12+ at the plug, which I really want for charging the battery on the horse trailer. Anybody know where that plug sources the 12+? I'm hoping there is a relay somewhere I can replace or something. Thanks guys!
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