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I have a 1999 Ford Expedition and I had bought a five prong recepticle for my stock wiring adaptor (round 7 prong?). The adaptor does not release the brakes. The dealer said it is a Ford thing and that the adaptor works on the Chevy. I used to have a trailer with just 4 prongs and my 4 prong adaptor on the truck worked fine. Now, I have the electric release for the brakes. I currently just do the flip 180 method to get by, but, I just want to get it working correctly.
Has anyone else had this proplem? I am almost tempted to just splice the fifth wire into the backup light wire on the five prong. Any suggestions?
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