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Trailer Disconnect Message

Discussion in 'General Side X Side Discussions' started by Jaybey, Mar 25, 2019.

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  1. Jaybey

    Jaybey Joe SXS Nation Expert

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    My new Ford F150 has been giving me fits for 18 months.
    May have finally resolved the trailer disconnect issue. Talked to a trailer technician at Big Tex. He told me crawl under the trailer where the electronic brakes. On my trailer it is the rear wheels only. He told me to put a splice in from the ground wire on the electronic brake to the frame. Easy way to determine which wire is with a test light rather than an ohmmeter.

    I did that took a 25 to 30-mile drive not one Ding-A-Ling not one trailer brake disconnect message. I will have to do a longer drive to be sure, but I think I may hit the magic formula.

    He mentioned the ground on the electronic brake is not always the best.
     
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  2. Ken

    Ken SXS Nation Team Leader

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    Good Job and fix Brother Joe! :)
     
  3. Seastacker

    Seastacker Carl Moderator

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    These newer trucks can be real sensitive to that stuff. They have a light module that controls the trailer lights and brakes. I have even heard of this module not even picking up smaller trailers with LED lights since they don’t draw enough to trigger the module to know there is a trailer back there. I have a 2017 Super Duty but have never had an issue thankfully. Glad you got yours figured out!
     
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  4. Ken

    Ken SXS Nation Team Leader

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    Joe has been fighting this issue for some time. I too have a 2017 Ford F250 and I connected my truck up to his trailer and I got the same issues he was having his 2017 F150. So we knew it had to be the trailer! I am glad he was able to get to the source of the problem
     
  5. Seastacker

    Seastacker Carl Moderator

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    Crazy how many issues a bad ground will cause. I always start with grounds now when I am diagnosing electrical issues.
     
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  6. Ken

    Ken SXS Nation Team Leader

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    After much trouble shooting Joe and I came to the same conclusion. Poor crimping of wires can drive you crazy too! He found the right side brake wires to look like they were crimped only to find them loose, that alone could have caused his issue, but you are right grounds can be rather funky to sort out. All this fancy stuff on these new trucks an computer operated stuff can also drive you crazy! :)
     
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  7. Seastacker

    Seastacker Carl Moderator

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    Just a quick rant on this.....I love this new truck. BUT, it is smart enough to know when a trailer is there. Its smart enough to know when a trailer is disconnected. Its smart enough to do all sorts of fancy things. IT DRIVES ME CRAZY that I have to go into the trailer settings every time I unhook and select "no active trailer" to get it to stop defaulting to the towing screen and accumulating miles on that trailer log! When I disconnect it should just do this automatically. So simple and so easy to fix, but damn it drives me crazy, lol.
     
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  8. Jaybey

    Jaybey Joe SXS Nation Expert

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    Carl, have you had the software updated recently. That may solve the issue???
    Also the right side rear tires with the electric brake were not just poorly crimped it look like they had been pulled apart the two wires were just dangling not touching the connectors at all.
    Also, if some does attempt this repair the wires do not matter which one is connected to the electric brake. Just use a test light to find out which is powered and ground the other one. I accidentlly, got the wrong one the first time and the truck told me I had a "TRAILER WIRING FAULT". A simple change to the other wire and my problems seem solved.
    Cross your fingers, legs, eyes, arms, etc, etc, etc.
     
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  9. Ken

    Ken SXS Nation Team Leader

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    Carl I have the same gripe!
     
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  10. Jaybey

    Jaybey Joe SXS Nation Expert

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    It has been a while BUT, I finally resolved the issue. I crawled under the trailer for a third time. Guess what I found? Apparently on one of the first runs with the new truck I went over something that snagged one of the trailer brake wires and tore it loose. Put a new splice in-line and no more problems, other than the stupid truck is smarter than a box of rocks. Now it will tell me I have a trailer tail light out but when I check it later everything is working fine.
     
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