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How to connect tow harness [resolved]

Discussion in 'Model X: Interior & Exterior' started by efusco, Apr 14, 2017.

  1. efusco

    efusco Moderator - Model S & X forums

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    IMG_8275.JPG IMG_8275.JPG IMG_8276.JPG IMG_8275.JPG IMG_8276.JPG IMG_8277.JPG Sorry if this has been posted somewhere before, I'm on my iPhone & am having a hard time with a search. I just bought a trailer has what appears to 7 pin connector. The only one I see is a round one on a spring door. There are two other connected wire bundles that I can. Am I supposed to unplug those and plug my trailer harness into female of those? Or am I just missing the loose harness somewhere?
     
  2. DaddyP713

    DaddyP713 Member

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    Can you upload a pic of the wiring harness for your trailer?

    The round 7 pin connector on the Tesla is the most common one for trailers with brakes.

    There is a flat 4 pin connector that is common with trailers that don't have brakes. You can buy an adapter for that.

    There are less common trailer harnesses that have 5 pins, and possibly another form of the 7 pin connector.
     
  3. bonnie

    bonnie Oil is for sissies.

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    If yours is a 4-pin (can't tell from the pics you posted), then the easy answer is to get an adapter. have a 4-pin (on my SylvanSport GO). I needed an adapter to use with my Jeep, and now my X. Adapters are available at any RV store or online.

    FullSizeRender.jpg.jpeg IMG_1181.JPG.jpeg
     
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  4. Solarman004

    Solarman004 Member

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    Do not unplug the flat wire harness in your photo. Everything is connected through the round port.
    I have a round-to-flat 4 adaptor for my trailer. But my local auto parts store had a variety of adaptors for every common trailer connection.
     
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  5. efusco

    efusco Moderator - Model S & X forums

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    Thanks. I found a 7 Blade connector with both a 4 pin and a 5 pin socket that worked great with the 4 pin connector on the trailer--got mine from Walmart, but here's one online:

    7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights Tow Ready Wiring TR20141
     
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  6. Yinn

    Yinn Active Member

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    This is the correct one. You will have a corresponding round plug from your trailer. Plug the 7 pin round into the 7 pin round recieved (behind the spring door) do not touch anything else.

    This single plug will control all of your trailer lights.

    I haven't seen a trailer myself (limited experience) with a multi harness, but I suppose it's possible. If you have a flat looking plug, you will need an adapter to convert it to be compatible. ($6-$10 usually)

    Also..does your trailer have brakes?
     
  7. bonnie

    bonnie Oil is for sissies.

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  8. efusco

    efusco Moderator - Model S & X forums

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    2017-04-16 11.26.43-1.jpg 2017-04-16 12.24.06.jpg 2017-04-16 12.24.13.jpg
     
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