Discovery 3 D3 - Trailer vs White Plug?





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  1. #1
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    Default D3 - Trailer vs White Plug?

    I found some posts here regarding the trailer (black) vs the white plug, and quite sure it said that there was permanent power on the white plug, and the black trailer plug power on ignition only.

    Mine is exactly the opposite, I bought some plugs today to fit one to my tyre compressor, ignition on I have power on the white plug, but then I found that I have permanent power on the regular black trailer plug?

    These are the pins I tested.

    Is this right? I would expect the trailer plug to only have power with the ignition on?
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  2. #2
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    The normal power point on my black plug is connected to the reverse lights, the first time I plugged my trailer in the trailer battery lit up the cars reverse lights.

  3. #3
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    My power for my duel battery comes off the white plug, it only has power when the ignition is on. Check with Peter which colour lead it is.

    Fused 30Amps under the cubby but 15 or 10 in the rear fuse box (second fuse from the top) which we changed to 30 as well

    The permanent feed looks like the "modular trailer break feed" also 30Amps, fused in the engine bay (E6?)
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  4. #4
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    This is how the 12S socket is wired.
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  5. #5
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    Done and dusted, pulled the pins out of a trailer plug and recomposed them to fit the white plug and put the plug on my compressor, no more opening bonnet to get to the battery with clamps!

  6. #6
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    What does the book say?

  7. #7
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    Can I use this setup to charge the my trailer while driving?
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