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Thread: Caravan electrical connections

  1. #11
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    Tony, you will only need a single resistor in one of the indicator circuits. You can do both indicators but it isn't necessary, nor is a resistor in the brake circuit.

    Ron
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  2. #12
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    Thanks. Yes, that is what I did in my D4 and it was fine. But if you want the trailer symbol to show up with both indicators then you need a resistor in both indicators. I’m pretty sure that was the case anyway.
    Tony

  3. #13
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    Update

    picture003-3.jpg

    Quote Originally Posted by GWH View Post
    Have just taken delivery of our td6 HSE and looking to get it ready to tow our caravan. A MY 18 built dec 17.
    Thanks for all the responses.

    I thought it may be helpful to share my experience.

    Have had a specialist Landrover autoelect complete the wiring for towing.

    In my case I needed the resistance added (LED module). The owners manual does specify a minimum current draw for the vehicle to pick up a trailer connections and highlights that some trailer LED systems may need this. Now mine does, and automatically disables the rear sensors when backing etc with the van connected. (it may cause other actions when towing but have not discovered these yet).

    The supplied 12 pin trailer connection had to be discarded as it is a sealed unit and I needed a 30 amp connection for the caravan fridge. The wiring diagram I got from my dealer showed that wiring was only good for about 16 amp ( I have a wiring diagram for trailer connections but its a bmp which I cannot seem to upload. now attached )

    I was surprised that wiring the vehicle for towing with a tow pro elite, battery isolator, anderson plug (for charging caravan battery), cable for the monitor for the caravan rear view camera, plus the above, was so complex. The autoelect said he has done at least 50 of these and he estimated the job would take 15 hours. It actually took a bit longer.
    Last edited by p38arover; 22nd July 2020 at 02:52 PM.

  4. #14
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    Good to read you got everything sorted. I'm surprised you need 30amp wire to run the fridge. From memory caravan mains connections are 15amp and that runs the fridge without any issues - I don't understand why you'd need a 30amp wire when charging from the car then.

    Quote Originally Posted by GWH View Post
    it may cause other actions when towing but have not discovered these yet
    You'll notice the gear shift pattern changes, with the car holding on longer to gears before shifting up. Also auto access mode isn't working with a trailer detected.

    Ron
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  5. #15
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    Hi Ron, the amount of current being drawn by a 3 way fridge depends on the size of the fridge.

    There are three sizes of 3 way fridge elements, and these draw around 9 amps, 15 amps and 25 amps for the largest ones.

    So setting up for a 30 amp fridge circuit covers all possibilities.

  6. #16
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    Fair enough, but how do you get mains power to them from a campsite? Do they have 25/30amp sockets, or you use 2 15amp sockets? We had a 3 way fridge in the Jayco which via the mains was powered by a single 15amp lead.

    Ron
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  7. #17
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    Quote Originally Posted by IndusD4 View Post
    Fair enough, but how do you get mains power to them from a campsite? Do they have 25/30amp sockets, or you use 2 15amp sockets? We had a 3 way fridge in the Jayco which via the mains was powered by a single 15amp lead.

    Ron
    The 30 amp is DC, current required is a lot less at 240v AC.

    Ohms law.
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  8. #18
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    Hi again Rob, you are talking about two different things.

    GWH is talking about 30 amps at 12v, coming from his tow vehicle, and you are talking about 230vac, from the mains, and yes this is only 15 amps, at 230vac.

  9. #19
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    understood, thanks!
    2016 D4 TDV6 Corris Grey
    --------------------------------------------------------
    2018 D5 TD6 SE Silicon Silver - gone
    2011 D4 TDV6 2.7 Indus Silver - gone
    IIDTool BT

  10. #20
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    I am confused - which many would argue is my natural state...

    If I want to wire in two ballast resistors so my D5 knows when it has a trailer attached, do I wire them in series Option A in the diagram below, or do I have to wire them in parallel with a switch, as in option B. The purple rectangle is the trailer plug on the car.



    I am guessing B because of reduced current flow, but I would be very happy to be corrected.

    Also, can anyone tell me where to find the wires - easiest access, please - and what colour wires I need.

    Cheers
    Numb Thumbs

    PS Lockdown is very time consuming...

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