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trailer brakes not working

Discussion in 'Truck & Equipment Repair' started by QuadRacer041, Sep 23, 2016.

  1. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    I'm having a problem with the brakes on my trailer not working. I've done some testing and seems the problem is intermittent and seems to be on the truck side.
    The truck is a 09 3500hd chevy gas. With factory installed brake controller.
    When i engage the slider to full brake power, i intermittently get power to the blue wire on the trailer side and also can here the magnets humming. Some times i ding will go off in the truck then it says either service trailer brake system or check trailer wiring. All the fuse in the cab and under the hood are fine.
    Any ideas where to look?
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,390

    Are all the trailer brakes on there own ground wire?