Mk3 16v to 20vt - unknown plugs

Discussion in 'Electrical' started by jg42, Mar 24, 2024.

  1. jg42 New Member

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    Hello all,

    I have a mk3 16v that I have had a conversion loom made up for a 20vt from Dubnutz. I have fed it through this weekend and was in the process of plugging it in when I came across a few plugs I didn't know the home of, and also noticed several plugs next to the fuse box unplugged, unsure where any of them go, any help would be massively appreciated.
    From Loom:
    mystery-loom-plugs-1.jpg mystery-loom-plugs-2.jpg

    Under Dash:
    mystery-ud-plugs-1.jpg mystery-ud-plugs-2.jpg

    Thanks very much in advance
     
    Last edited by a moderator: Mar 25, 2024
  2. PhilRyder

    PhilRyder Paid Member Paid Member

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  3. jg42 New Member

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  4. PhilRyder

    PhilRyder Paid Member Paid Member

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    Have you checked the back of the fuse box? There shouldn’t be any gaps. If there are it will be fairly obvious if any of you “spare” ones go in those spaces, they are all different shapes and sizes and only go in one slot.
     
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  5. jg42 New Member

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    I'll have another look and double check but I can't see a spot where the single pin plugs can go into the fusebox. I'll try to find some more pictures of an assembled one and go off that.

    Again thanks for your help mate
     
  6. PhilRyder

    PhilRyder Paid Member Paid Member

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  7. rubjonny

    rubjonny Administrator Staff Member Admin

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    View attachment 35978
    yellow plug with red wires -> Z/1, some kind of power feeds for 20v loom I assume
    brown -> earth claw near fusebox, some kid of earth (assuming loom builder follows VW colour coding)

    View attachment 35979
    black 3 pin -> to dash cluster loom, is for indicator warning & mpg signal
    red 4 pin -> mating plug below, is for headlight range control motors
    brown -> mating plug below, diagnostics

    View attachment 35980
    red 4 pin -> mating plug above, headlight range control motors
    other 2 not sure, leave them alone for now. pretty sure these are usually spare on MK3

    View attachment 35981
    mating plug above, diagnostics
     
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  8. jg42 New Member

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    Thank you very much rubjonny, lifesaver!
     
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