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Thread: Trailer brake trouble.......

  1. #1
    Join Date
    Nov 2006
    Central CA

    Trailer brake trouble.......

    My big trailer/mobile shop has set for the past 5 or 6 months. I hooked it up yesterday to go to my customers house and I had a little trouble with the trailer brakes. Today the controller just stopped working. The drive back to my house was a little concerning but I made it back without incident. I have had a Tekonsha Prodigy brake controller, brand new in the box, for about a year now but I haven't put it on. Well, I did today. Incidentally my truck has a full trailer tow package including a 7-pin plug for the trailer.

    However, after installing it, via direct factory pigtail connections (no splices), I set the sensitivity/power per the instructions and, once satisfied, I went on down the road. But, after about a mile, the digital display started to give me readings that went from no connection to an overload condition to standard operation and back and forth randomly and intermittently. When the normal readings were displayed, the trailer braked accordingly (and it was very nice BTW). However, sometimes I would apply the brakes and the trailer brakes would not engage and an overload reading would display. Then, after a second or two, the normal readings would come back and the brakes would engage. Sometimes the overload display wouldn't go away and the brakes would just not engage. I"m definately not overloaded.

    Every once in a while, the display for "no connection" would come up and again, the brakes wouldn't engage.

    Does this just sound like a dirty connection to you? I stopped by a Kragen Auto Parts store and picked up some electrical connector cleaner but I haven't sprayed it on yet.

    Anyone have any advice or suggestions or experience to pass on for/to me?

    And would someone be so kind as to remind me of the type of grease to use inside of my 7-pin connector? For the life of me I can't remember the name of the type of grease.

    Thank you very much for your time.

    BTW, all of the other functions of the trailer though the 7-pin connector work fine and haven't shown any trouble whatsoever.
    Thanks, Mark.

    Custom Bonehead.

    My diet is working good. I'm down to needing just one chair now.

    "Just think how stupid the average person is, and then realize that half of them are even stupider!" --George Carlin

  2. #2
    Steve Clardy Guest
    Clean and check connections.
    Check the ground real good there at the trailer tongue.
    They do make a elec. grease, available at elec supply houses.
    Some auto stores carry it.
    Borg might carry it.

  3. #3
    Join Date
    Nov 2006
    Between Aledo and Fort Worth, TX
    Mark, I'm not sure, and I'm not sure of the spelling, but I think it's called "di-electric" grease. Jim.
    Coolmeadow Setters...
    Exclusively Irish!
    Home of Irish Setter Rescue of North Texas
    When Irish Eyes are smiling, they're usually up to something!!
    At a minimum, I'm Pentatoxic...but most likely, I'm a Pentaholic. There seems to be no known cure. Pentatonix, winners of The Sing Off, season 3

  4. #4

    John Nelson

    Mark, It sounds like a bad ground. There should be a ground wire from the 7 pin connector to both tee trailer and the truck. You might have to disconnect them ,and clean both the frame and terminal . Just because they feel tight doesn't mean there is a good electrical connecttion.

  5. #5
    Join Date
    Jan 2007
    New Springfield OH
    I agree it sounds like a grounding problem. I run a ground wire from the battery all the to the trailer. Try to put the trailer ground where its protected somewhat from the elements. Keep that connector greased. We used to use NoLox
    Back in my driving days my brother and I always did this on the trucks, along with running ground wires to each and every light. Nothing worse than fixing lights at midnight in 10 degree weather. The drug one out of the weeds last summer. For grins my nephew plugged it in and every light lit after sitting there 12 years

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