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Trailer brakes wiring

Discussion in 'Trailers' started by Gchartrand, Nov 24, 2019.

  1. Gchartrand

    Gchartrand Member

    Joined:
    Oct 25, 2019
    Messages:
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    Location:
    Ontario, Canada
    I just replaced the trailer brakes on our 7K axle trailer. Does it matter what side the wires are plugged on the brake drum side? Cause right now I don't have very much brakes after assembling the new complete drum assembly.

    Is one ground and the other power?

    It's also a 2 axle trailer.
     
  2. AllDodge

    AllDodge Senior Member

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    Apr 2, 2011
    Messages:
    1,568
    Location:
    Kentucky
    Assuming electric brakes, it doesn't matter which wire, one power and other ground.
    It does matter if the ground side has a good ground back to the truck. It can be attached to the frame, but works best if there is a ground going back to the trailer connector.

    Did you adjust the shoes to fit the drum?
     
    Tags likes this.
  3. Gchartrand

    Gchartrand Member

    Joined:
    Oct 25, 2019
    Messages:
    14
    Location:
    Ontario, Canada
    So I'll have to check those things you just mentioned this week once I get the chance.

    And no I never knew that those drums needed to be adjusted.
     
  4. AllDodge

    AllDodge Senior Member

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    Kentucky
  5. willie59

    willie59 Super Moderator

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    Service Manager
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    Knoxville TN
    And adjust the brakes on those axles can be a challenge depending on how they are mounted. If the tube is above the spring (typical) the u bolts and bottom plate are right in the way, and if it's a drop axle, fa get about it, pull the wheels/tires off.