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Bulb Warning after HID install

Discussion in 'A3/S3 Forum (8L Chassis)' started by Dave_Bayern, Dec 20, 2006.

  1. Dave_Bayern
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    Dave_Bayern Slipping at 3.5Krpm

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    [Dec 20, 2006]
    I know a lot of people here have retro fitted HID lamps for dipped beam.

    I used a serious vision kit supplied by JBR Performance and although its very good quality its a generic kit so the instructions aren't perfect.

    How do you get around the bulb out warning on the DIS? Can I switch it off via VAG-COM or is there something I can short?

    Thanks
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  2. sjokolademelka
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    sjokolademelka Member

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    [Dec 20, 2006]
    hooking the hids up with a relay, would most likely do the trick
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  3. timps
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    timps Shakersville

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    [Dec 20, 2006]
    You need to wire in a resistor to fool the bulb check circuit.
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  4. Dave_Bayern
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    Dave_Bayern Slipping at 3.5Krpm

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    [Dec 20, 2006]
    Yeah, I already used a relay circuit but you still take the original connectors out of the loop by wiring in HIDs.

    I resistor would certainly work but does anyone know which value I should use?
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  5. FactionOne
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    FactionOne Administrator Staff Member Administrator

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    [Dec 20, 2006]
    First let me say that this is NOT based on something I've heard/read from someone who's actually had this problem and used a resistor to solve it. I've just used power and resistance maths to have a stab...

    If I understand what you're trying to do (fool the DIS that you have a normal bulb completing the circuit when you actually don't) - I guess it would be something like...

    a) If you're drawing power from somewhere else entirely and are just using a relay which will draw negligible wattage from the original circuit, and you need to simulate a 55W Halogen bulb sitting on the 12V line; that would require a 2.618 ohm (if we're splitting hairs ;)) resistor if my maths doesn't fail me.

    or (less likely I guess)

    b) If you have a 35W Xenon bulb somehow on the lines where you used to have a 55W Halogen bulb) - you need to connect the circuit and simulate an additional 20W draw on the 12V line - that would require a 7.2 ohm resistor.

    Anyway like I say, that's more science than experience, but I think I'm on the right lines...

    Regards,

    Rob.
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  6. FactionOne
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    FactionOne Administrator Staff Member Administrator

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    [Dec 20, 2006]
    #6
  7. Dave_Bayern
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    Dave_Bayern Slipping at 3.5Krpm

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    [Dec 20, 2006]
    Cool, thanks!!

    Black
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    Our
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    Without
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