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Bi-xenon question, what does this bulb do?

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by TimFok, Aug 6, 2014.

  1. TimFok

    TimFok ex vRS driver

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    Just bought some OEM bi-xenons.I may be wrong, but was under the impression the single D1S served as both dipped and full beams.If that is the case, what does the bulb next to the sidelight pictured below do? If this for when flashing? Or am I mis-informed and this is the full beam bulb.[​IMG]Thanks in advance
     
  2. NHN

    NHN Retrofitter - Audi - VW - Skoda - Seat
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    Daytime running lights.
     
  3. Giosabcsl

    Giosabcsl Active Member

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    The D1S does as you say. Full beam as well as dipped. And when you flash someone it will use the D1S/xenon part. The inner is DRL or day time running light. And the little light above that is the park light.
     
  4. TimFok

    TimFok ex vRS driver

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    Thanks for the replies.

    And I don't suppose anyone who's fitted them with harness' can answer - How are these activated with the standard light switch in the cabin? Does it take a different light switch to enable them?
     
  5. jdp1962

    jdp1962 Grumpy Old Moderator
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  6. Giosabcsl

    Giosabcsl Active Member

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    Interesting you say that my DRL in my DTM is controlled by a switch to the left of my main switch that controls my "OFF, AUTO, On etc"
     
  7. jdp1962

    jdp1962 Grumpy Old Moderator
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    Apologies; seems I got that wrong.
     
  8. Giosabcsl

    Giosabcsl Active Member

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    To be honest you may still be correct. Because I dont know if the halogen OEM lights have a DRL built in ? Because if they do then they should run off either ignition or off the light switch. Never had halogens always owned cars with xenons.

    So it may just be a case of that the Xenon Units with DRL in the Audi are switch controlled. But the halogen are ignition or the main light switch.
    That is how mine looks below with out the switch next to the DRL on the right which is stay home lights or something mainly on the american audis.

    DRL.jpg
     
  9. SinghB7

    SinghB7 Active Member

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    If the car came factory with the xenon headlamps then you will have the DRL switch inside to turn them off and on.
    When retro fitting you programme them with vagcom and they turn on and off with ignition. You can wire the switch for it but don't have the link for a guide.
     
  10. PetrolDave

    PetrolDave Well-Known Member

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    The switch controls whether or not the DRLs come on at all, if they do come on it's with the ignition not the light switch.
     
  11. jdp1962

    jdp1962 Grumpy Old Moderator
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  12. psychopomp1

    psychopomp1 Member

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    Really? I had bixenons retrofitted 1-2 years ago and a new DRL switch was fitted with 0 and 1.
     
  13. Lewbo

    Lewbo Well-Known Member

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    Once fitted on coded the DRLs will come on with the ignition with no need to fit the switch unless you wanna turn them off but what's the point in that.
     
  14. TimFok

    TimFok ex vRS driver

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    Thanks for the replies guys.

    Yeh not worried about a DRL switch!
     

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