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Trailer wiring

Blagadan Mar 23, 2020

  1. Blagadan

    Blagadan Registered User

    Hi All,

    I fitted a tow-hitch to my 2011 A6(C6) Avant over the weekend but I still have to connect up the relay module for the EU spec trailer light socket.

    Do any of you have a wiring diagram that shows the connector block where I splice into, and what wires are for what? I believe the common place to tap into the electrics is the boot, on the driver side (pic attached)

    I have wired up 7 pin trailer sockets in the past, but this is the first car I've done with can-bus, so I'm a bit nervous.

    Thanks for your help!


    Attached Files:

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  3. NHN

    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

    If it's OEM module then it'll more than likely need coding too especially if it's got parking sensors.

    Finishing a C6 next week as client was missing the wiring, lots of wires for sure.

    If you're looking for this to be completed for you, ping me a WhatsApp.
    Blagadan likes this.
  4. Blagadan

    Blagadan Registered User

    A universal module was supplied with the tow hitch.

    Similar to this one - Universal PCT Automotive ZR2500 https://www.pfjonesebay.co.uk/instructions/ZR2500.pdf

    The wiring of it looks straightforward, but knowing which wires to splice into on my vehicle is my hurdle at the moment. I've searched on a few of the forums, but the dreaded photobucket BS has ruined a lot of really good install threads.

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