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Old 08-09-2014, 02:05 PM   #1
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Ford E450 brake Controller wiring problem

I am new to RVing trying to figure out the under dash connections for a Hayes controller. I read the posts about Ford's plug hidden behind the coin holder. Found it. Can I splice the four controller wires into it and have trailer brakes or should I try to find a way to wire into the four wire bundle under dash labeled connect brake controller here. The problem with the latter is the black wire is supposed to be powered and it is not?

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Old 08-09-2014, 09:07 PM   #2
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Or just buy the 15 dollar adapter and plug it in. Then get your owners manual out and make sure the fuses and relays are in place in the under hood fuse box. The year would help as well since they mad ea few changes on them. Here is one fuse box layout.


4 fuses and 2 relays have to be in place for complete trailer wiring.
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brake, ford, wiring

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