Locked Up

Discussion in 'Trucks and Trailers' started by duranlandscaping, Mar 6, 2010.

  1. duranlandscaping

    duranlandscaping LawnSite Member
    Messages: 76

    The brakes on my open trailer lock up everytime that I hook them into the truck. Was doing it off and on last season but now they will not release unless i unplug them. Anyone have any ideas on what this could be? Dead battery on the breakaway kit? New Plunger?

    Messages: 3,169

    sounds like a short
  3. mowisme

    mowisme LawnSite Senior Member
    Messages: 910

    My controller has a 'wheel' you turn to make them more sesitive or less sensitive..( more voltage to them=more sensitive I think but not sure?).. any chance yours has this wheel or lever and it got bumped to point they are on always? maybe controller is bad?
  4. 360ci

    360ci LawnSite Senior Member
    Messages: 998

    I'd take a multimeter to the lines first and see if you can't oHm anything out. First, be sure to use some white grease on the contact points and see how that works for you.
  5. P.Services

    P.Services LawnSite Fanatic
    Messages: 6,319

    dont feed it so many steak bones. mama use to tell us not to feed the hound so many bones or he will get locked up. I never knew what she meant but you cleared it up.
  6. esnipe8

    esnipe8 LawnSite Senior Member
    Messages: 264

    Ours was doing the same. I think it ended up being either a dead battery or a back plug connection. Did the plug ever come out while driving and drag on the pavement?
  7. duranlandscaping

    duranlandscaping LawnSite Member
    Messages: 76

    The plunger got ripped out. My brother pulled forward before i took the cable off the hitch. The plunger went back in. I don't know if I need to replace that or not. The plug from the truck has never come loose. Brand new controller. When I plug in the brakes the controller will not recognize that it is connected but brakes instantly lock.
  8. Horsepower Lawns

    Horsepower Lawns LawnSite Member
    Messages: 213

    Someone moved the brake wire to the hot wire spot. So, when you plug it in it gets full power on the brakes and locks them up or the wire is lose inside the plug.
    The breakaway switch pin is broken or not in all the way. So when you plug it in the hot wire on the truck charges the battery and because the pin out/broken it get full power.
  9. duranlandscaping

    duranlandscaping LawnSite Member
    Messages: 76

    This is what I was thinking. Can i just replace the plunger on the breakaway or the whole unit that it plugs into and resplice it.
  10. Horsepower Lawns

    Horsepower Lawns LawnSite Member
    Messages: 213

    You can do either. But, just the pin and cable is almost as much as the whole thing.

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