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Thread: Trailer tail lights always on

  1. #1

    Default Trailer tail lights always on

    So i had a westfalia euro towbar installed on my SQ5 2 years ago. Long story short but i basically haven’t used it since. I’ve noticed that my tail lights on trailer are constantly on. Turning lights on/off makes no difference. The only 3 trailers I can test have led lights but two have incandescent bulbs on the plate light.

    is this a coding thing?

  2. #2


    well now I feel like a ********. Double checked my adaptor wiring (13 pin to 7 pin small) and I had tail lights on the permanent live feed. Swapped it and she's all good.

    I thought I had double checked this but must have got confused with the different wire colours of both plugs

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