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Thread: Dumb Question - Electric Brake controller.

  1. #1
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    Dumb Question - Electric Brake controller.

    Gday All,

    I did try and google this , feel silly asking , but most of my towing involves air activated brake system.

    If i have an electric brake controller in my car ( D3 ) and i want to tow a trailer with override brake set up ... less than 750kg in my case my ex army trailer.. Do i need to do anything to the trailer wiring in regards to the electric brake signal from the car.

    I have the LED lights etc sorted , just more interested in wiring for brakes in the trailer socket... does there need to be a wire disconnected from 1 of the pins.

    Thanks and Cheers Bulletman

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    The electric brake controller should show a fault indication for the trailer brakes due to the trailer brake circuit being open-circuit but it won't have any effect on the car's braking. No need to touch any of the wiring.
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    Whilst it shouldnt have any effect on the brake controller, i always play safe. In the old days we used to wire trailers to do 5 and 7 pin by joining the pins. If you have no control over the trialer wiring and or other people borrow your trailer use two sockets.
    I have two sockets on my cars with brake controllers one for electric brakes and one for override brakes. This eliminates any potential problems that can be caused.
    It is also a good idea to have a switch on the brake controller to turn it off if not using it for longer periods, this also eliminates wiring problems occuring if a wire gets worn.
    I use one round socket and one flat socket to identify which is the brake socket.


    Ian
    Bittern

  4. #4
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    alien is offline A Keeper of the TGO Silver Subscriber
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    Apologies for the late arrival on this thread.
    With electric trailer brakes the vehicle should be wired to a standard 7 pin configuration.
    If you wire a 7 pin male to the trailer wired to the same standard you’ll have 2 spare pins not being used,2(usually a reverse or power supply) and 5 for the trailer brakes. The remaining 5 pins are the earth, brake, tail and indicator lights.
    Cheers Kyle
    Cheers, Kyle



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  5. #5
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    Dumb Question - Electric Brake controller.

    Bulletman, if your trailer has override brakes you don’t need a controller, as the brakes are either cable or hydraulically actuated through the trailer couplingDumb Question - Electric Brake controller.

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