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Hayes trailer brake controller

Discussion in 'Heavy Equipment & Pavement' started by mrsops, Dec 14, 2012.

  1. mrsops

    mrsops LawnSite Silver Member
    Messages: 2,876

    Has anyone ever came across the letters OC flashing on there brake controller when steping on the brakes with the trailer connected?? I used my new towmaster trailer the other day and the controller says p when im driving then when i apply brakes it works just fine...

    My interstate trailer is flashing OC when my trailer is connected. So i know it cant be the truck thats the problem, What the hell is going on??
  2. tailboardtech

    tailboardtech LawnSite Senior Member
    Messages: 390

    OC means open connection so it could be anything from the brakes need replaced on the trailer to a broken wire somewhere. The P just means you have Power to the controller
    Posted via Mobile Device
  3. mrsops

    mrsops LawnSite Silver Member
    Messages: 2,876

    It has to be a wire because this trailer is only a year old!! I looked all over and didnt see anything broke maybe i missed something
    Posted via Mobile Device
  4. bobcatoh

    bobcatoh LawnSite Member
    Messages: 24

    If the magnets have enough wear on them, the internal coil shorts out to the brake drum. It will give the oc message.

    I always change them when new pads are installed.

    In fact I just install the whole backing plate assembly.

    The best thing to do is switch them out to electric over hydraulic disc breaks.

    That's what I have done on my trailers.
  5. mrsops

    mrsops LawnSite Silver Member
    Messages: 2,876

    I can't see the magnets being worn out I don't use this trailer much maybe once a week if that..
  6. mrsops

    mrsops LawnSite Silver Member
    Messages: 2,876

    Very strange the trailer is being used today and the oc hasnt come up
    Posted via Mobile Device
  7. ksss

    ksss LawnSite Fanatic
    Messages: 7,142

    Make sure that the plug is seated solidly in the receptical. Sometimes I get the same thing if its not seated fully.
  8. mrsops

    mrsops LawnSite Silver Member
    Messages: 2,876

    Im thinking thats what it has to be
    Posted via Mobile Device

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