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  1. #1
    3rd Gear

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    Jul 2008
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    Birmingham
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    629

    Making a front fog wiring loom

    My car doesn't have fogs in the headlights and there's no wiring behind the fog switch blank, so I guess there's no loom for it.

    I made a loom for my Mk3 Golf. The positive pins on the back of the fogs splice together then pushed into a multiplug above the radiator as the loom from plug to dashboard was already there. The negative pins spliced together then went to the negative terminal on the battery using a spade terminal. Then I just bought a new headlight switch with front fog function and it worked.

    I suppose it's not so easy on the A4 as there's probably no wiring for it at all on mine.

    So... positive pins go where? I'm not too fussed about them not switching on/off with the headlights. I've got a switch and the fogs are on order.


    A4 1.8TQS

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  3. #2
    "Stick a V8 in it!"

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    Jan 2008
    Location
    Glenrothes, Fife, Scotland
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    theres probably a relay that will fit in the main fusebox which switches the load, that relay will likely take its power from the headlights, so they will work as expected.

    On our 96 the front fogs turn on automatically with the rears, or, independantly if the headlights are on, ie you can only have front and rear, or just front.

    I'd imagine if you look at the wiring diagram in the haynes it shouldnt be too hard to work out, but it might be easier if you get the front fog switch plug and some of the loom from a breaking car to allow you to make the connections.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


 

 

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