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Thread: Trailer Plug

  1. #1
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    Trailer Plug

    Hi All,

    I was Just pottering around cleaning and checking the D4 over and thought I would make sure all the connections on the trailer plug were working.
    When the parking/tail light switch was on and nothing else There was also power at the blue brake wire ? It went on and off with the light switch.
    No brake controller fitted.
    Is this normal ?
    Not on any of my other vehicles !

    Your thoughts ?

    Pete.

  2. #2
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    It will be because the wiring is for the UK and Europe. Over there they use two seperate wires for the side lights (left and right, Blue and Brown I think). Consequently it was showing power for the side lights not the electric brakes (which they don't have a lot of in the UK).

    HTH

    Ivan

  3. #3
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    I understood that the left white plug was euro and right was aussie ?
    It actually activated trailer brakes and caused the vehicle to slow,once again no brake controller.

    Pete

  4. #4
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    The blue wire is connect to the brown tail light in the loom behind the left taillight. As it comes it has two taillight feeds, left and right, but in Australia we just have the one taillight feed and the other is brake controller. The threads on here about connecting brake controllers cover breaking this connection when fitting the controller.
    Probably not a real issue unless you want to have a brake controller.

    Regards
    Gerry

  5. #5
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    As mentioned above - there is plenty on this in the RRS/D3/D4 section - so do a search if you want to find out more.

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
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    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  6. #6
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    Could it be wired the same as the D3's here:

    D3

    You want pages 13 and 14,
    I notice blue is the trailer fog lamps...

    Cheers,
    Fraser

  7. #7
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    Quote Originally Posted by disco4now View Post
    The blue wire is connect to the brown tail light in the loom behind the left taillight. As it comes it has two taillight feeds, left and right, but in Australia we just have the one taillight feed and the other is brake controller. The threads on here about connecting brake controllers cover breaking this connection when fitting the controller.
    Probably not a real issue unless you want to have a brake controller.
    Regards
    Gerry
    Actually it IS A BIG ISSUE if you have electric brakes on a trailer, as soon as you put on the parking lights the trailer brakes will come on full. That is, they will come on until the fuse blows.

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.

  8. #8
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    That is what I thought happened !!!!
    Can I just disconect, and tape the end up when I put in my brake controller which will run through that pin ?

    Pete

  9. #9
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    Quote Originally Posted by Pete1 View Post
    That is what I thought happened !!!!
    Can I just disconect, and tape the end up when I put in my brake controller which will run through that pin ?

    Pete
    Yes!

    There is a thread on how to install the controller using the original wiring. d4-electric-trailer-brakes

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.

  10. #10
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    On the D4 the trailer harness plugs into the loom behind the tow hitch receiver compartment (passenger side in cargo area). From here it is easy to isolate the Blue wire and connect in the trailer brakes.

    The top connector feeds the white capped socket (intended for power for caravans etc in EU) the lower one is for the trailer lights etc.




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