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Thread: Need help with electric brakes on trailer... ford ranger.

  1. #16

    Re: Need help with electric brakes on trailer... ford ranger.

    Adapter is 35 -40 bucks

    please note that if you leave it on when trailer is not hooked up and you have reversing sensors they will not work. It thinks you have a trailer on and disables them.
    Cheers

    Steven

  2. #17

    Re: Need help with electric brakes on trailer... ford ranger.

    I bought the adapter last week and tried it. No difference, bought a multi meter today so will do some testing once i get home from work.

  3. #18
    Ausfish Bronze Member
    Join Date
    Jan 2009
    Location
    Harrington, NSW

    Re: Need help with electric brakes on trailer... ford ranger.

    The adaptor is only required for the latest model Ranger/BT50.
    It does sound like your problem is in your vehicle, and many of these trailer light issues can be traced back to a faulty earth. If I were you that is where I would start, locate and clean up the earth and go from there.

  4. #19

    Re: Need help with electric brakes on trailer... ford ranger.

    ok so after going over the trailer we released the tail lights were both damaged. All lights are working well now. Still having problems with the brakes, there not activating the unit on the trailer at all. I have a tekonasha brake controller in the car and the brakes are hydrastar electric brakes.

    anyone got any ideas on what it could be?

  5. #20

    Re: Need help with electric brakes on trailer... ford ranger.

    Quote Originally Posted by Mattywalton View Post
    ok so after going over the trailer we released the tail lights were both damaged. All lights are working well now. Still having problems with the brakes, there not activating the unit on the trailer at all. I have a tekonasha brake controller in the car and the brakes are hydrastar electric brakes.

    anyone got any ideas on what it could be?
    Is the Tekonsha recognising the trailer (Is it a P3)? If so the P3 will also give some basic diagnostics, voltage, etc in the system.

    Pull the breakaway. If the brake comes on then there is probably nothing wrong at the brake unit on the trailer.
    Assuming the controller recognises the trailer, go and check the power supply (active/earth) on the larger pins (the row of 5). There should be a constant 12v there. If not, the brake controller will not be powered form the vehicle, even if the Tekonsha is sending a control signal.

    If you haven't, check the pin configurations form my earlier post, it will help you check the correct pins have power supply.

  6. #21

    Re: Need help with electric brakes on trailer... ford ranger.

    The controller is recognising the trailer. I've got the tekonsha voyager controller. On the trailer it's just a 7 pin flat and I wired in a 12 pin plug on my ranger, but only the 7 pin flat part. I've heard I need to tap into the positive of my Anderson plug and connect it to pin 2 on my car plug. Does this sound right?

  7. #22

    Re: Need help with electric brakes on trailer... ford ranger.

    Not really, but it could be if you have an odd (wrong) arrangement of pins in use. Pin 2 on a 7 pin is for a reversing light, so may have been used by someone as it was "spare". The power supply for brake controllers is not typically fed via 7 pin plugs, they are not rated high enough for the current draw required.

    The controllers are pretty simple. In addition to the standard 7 pin wiring (to run lights etc) they will add:

    1 - control wire, "service brakes" or pin 5 on your 7 pin. (this is the operation signal to the controller).
    2 - An extra earth for a high current 12v supply to run the controller (in addition to the standard earth already hooked into the 7 pin).
    3 - An active for a high current 12v supply to run the controller.

    2 and 3 above are for a high current supply, say up to 50A supply depending on the operational current of your controller. ( i Have a dexter controller). This is usually wired directly from the battery (with 6mm cable or 4.5mm2), with its own in line fuse. It can either be wired via two of the large pins on a 12 pin plug (the larger pins are rated for the higher current than the smaller 7 pin part of the plug), OR as many people do, a separate Andersen plug both at the vehicle and trailer for the supply. When an andersen plug is used, it is not uncommon for people to use that in addition with a standard 7 pin plug. Keeps their standard plug in place, AND adds the high current supply for the controller. They still tap the control wire into the standard plug pons as per normal.

    If done on a 12 pin plug, it is typically pin 9 (battery +tive, Pin 10 Earth).

    Refer here for the diagram of how the pins should be wired.
    http://www.narva.com.au/products/browse/wiring-diagrams

    DO you have an andersen plug at the vehicle only?
    If you have a 7 pin at the trailer, I am guessing that you either have
    - An andersen plug there also, in which case it needs to be connected OR
    - someone has incorrectly wired the supply to the trailer via one of the spare 7 pins (like pin 2). This may work, but understand you really do not it set up to properly supply the operational current that the controller may draw, which is probably not a good idea.

    If you have an Andersen plug already at the vehicle, maybe you should consider using it to route 12v to the power supply for the controller.

    If you don't know what is there or how it was set up, I suggest you need a multimeter and need to start tracing what is connected and fed from where....


    Hope this helps....
    Cheers.

  8. #23

    Re: Need help with electric brakes on trailer... ford ranger.

    This is the 7 pin flat plug on trailer
    Attached Images Attached Images

  9. #24

    Re: Need help with electric brakes on trailer... ford ranger.

    The attachment shows an invalid link...

  10. #25

    Re: Need help with electric brakes on trailer... ford ranger.

    I have sent you a pm with my number if you want to give me a call. I might the able to help some more....

  11. #26

    Re: Need help with electric brakes on trailer... ford ranger.

    why is the red fat wire hooked to the white 3 pin the earth ???? and black cable to pin 2 reversing lights ????? you have a reversing light wired wrong way ????

  12. #27

    Re: Need help with electric brakes on trailer... ford ranger.

    There are no reverse lights on the trailer. Not sure what the red wire is, auto electrician did it a while ago.

  13. #28

    Re: Need help with electric brakes on trailer... ford ranger.

    As per Astro 66 comment, it appears the heavy read and black ned to be reversed. Pin 3 (White) is the earth and pin 2 (currently with fat black cable is not used normally (designated for reversing lights which you would not have on a boat trailer). My guess is someone has used pin 2 to send +tive for the brake controller power supply, and then the earth cable is hooked into pin 3 with the oral earth.
    The heavy cables are thus back to front. Your brake controller would be getting power with reversed polarity......


    Be warned however, the smaller ins of a 7 pin are not made to carry the current brake controllers require to run. That is why the power cables are a heavier gauge. That is why they usually run on the heavier pins on a 12 pin plug OR people runs separate andersen plug (all will carry 50 amps).

    You would also ned to know that the corresponding pin 2 on your vehicle has the higher current dedicated power supply to it, if you tick with this arrangement.

    maybe a good idea to check what current the hydrastar draws also..... You would hate to think the power supply is not up to the needs of the controller in a heavy braking situation.

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