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Have a 2002 explorer that came factory with the big 7 pole trailer package and came with the brake module harness loose. Where does this harness plug in? I cannot find it anywhere? Would this vehicle already have the blue trailer brake wire to the rear plug also???
If you buy a brake controller with the correct harness (I recommend Prodigy), you can plug it in and not have to mess with splices on the factory harness. I used a long tie-wrap to pull the wires thru to the driver's side (clever Ford, putting the plug on the passenger's side).
If it takes a Ford tech 1 1/2 hours to find it, he and the service advisor should both be canned for not doing a little research first. Glad I was able to help.