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Old 09-11-2018, 01:13 PM   #21
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Join Date: Feb 2018
Location: League City
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M.O.C. #21290
I started having this same problem with my last 5er and 2014 F250. The first time was during a rain storm. After everything dried out it worked fine. Then it started happening just about every time we went out rain or shine. I tried dielectric grease, replacing the umbilical and replacing the battery with an Optimum. Replacing the battery solved the problem for a while interestingly enough...not sure why. But it came back. The Ford F-Series are known for trapping moisture in the bed plug and the trailers are known for frayed wires. I think my problem was a combination of both. The only way I was able to solve the problem was to buy a new truck and trailer.

2018 3731FL Legacy
2017 F350 Dually
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Old 09-18-2018, 12:04 AM   #22
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Join Date: Dec 2006
Location: The Dalles
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M.O.C. #6613
Agree, it happened to me in no where BC. Remembered my dad saying "always check the ground when you have electrical issues"
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Old 10-18-2018, 05:16 PM   #23
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Location: Belfair
Posts: 14
M.O.C. #14615
I had the exact same problem. I did the cleaning and made the tangs tighter at the 7 pin connection still same issue. I knew my brake wires were fine as I had just done a complete brake job. Before this trip I replaced the pig tail from the trailer. 2000 miles later and no problem.
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Old 10-18-2018, 07:05 PM   #24
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M.O.C. #18510
SHHH! Don't tell anyone, but ever since Gettysburg, we have driven to New Jersey, then Delaware, then to Virginia Beach, VA, then to South Carolina, and it has not reappeared. When the mobile tech took my hub off my right front wheel, and the brake adjuster and spring fell onto the ground, he put it all back together and adjusted the brakes, and the warning has not reappeared yet? :-)
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
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