2017 F350 not wired to tow a trailer - 2CoolFishing
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Old 03-29-2019, 10:23 AM   #1
ColeS
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2017 F350 not wired to tow a trailer

I have discovered the +12v pin on my 7 way connector is not powered, and thus will not operate the EOH brakes on my boat trailer. EOH is a selectable option on the “My View” panel, there is a built-in brake controller in the cab, and the truck came with a trailer tow package. But after two weeks at the dealer I’m told there’s nothing wrong with the truck, that it simply wasn’t built with the “option” to have power to that pin.

Anyone else had this experience? And anyone else towing a trailer with a late model F350 might want to be sure your brakes are really being powered.

Cole
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Old 03-29-2019, 10:42 AM   #2
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My GMC had the same problem, but I found a wire under the hood for 12v power that needed to be connected. Was thinking the same for Ford, so I happened to see this response from E-trailer on the power problem.
Don't know if this will solve your problem, but it's a shot. Seems some dealers don't really know how the trailer power really works, if this is correct.

https://www.etrailer.com/question-278872.html

Hope it helps.
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Old 03-30-2019, 07:01 AM   #3
ColeS
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Thanks, that's very helpful. The fuse and relay for that pin are missing from my battery junction box, which led us to believe the truck simply lacked the necessary wiring. But this, and information I got on another forum, indicate charging voltage comes from the trailer module instead and I may not be meeting all the conditions necessary for it to activate. So I'll investigate further.

This is my third F-350, and I think they tried a little too hard to be clever with some of the automatic features, like this, they built in it. I may have to ask my son to give me my old 2002 truck back.

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Old 03-30-2019, 06:49 PM   #4
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When I was looking around about it, I saw a couple of threads on different forums that all said, what that etrailer article said. Most said they had the exact same issue you stated, but once they moved and hit the brakes the power activated. Not sure that is good, as I would want to have power at all times, so when I hit the brake pedal so I knew the EOH would be working. All these manufacturers make it very complicated to use the OEM controller. Let us know what you find.
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