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    VWVortex


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    Thread: drl bulbs

    1. Member
      Join Date
      Nov 1st, 2010
      Location
      Rutherford, NJ
      Posts
      459
      Vehicles
      MK4 R32T ; 2010 Audi A3 TDI
      10-13-2012 09:53 PM #1
      http://www.ebay.com/itm/130759909254...witem=&vxp=mtr

      so i wanted to switch it up a bit and put in a nice euro yellow/amber bulb for the drls

      i ordered the projector bulbs above which are actually pretty cool and have the perfect color but they wont work

      if i supply them with 12v from they turn on but then i checked voltage at the socket and it only read 5.5volts

      im a little confused since the stock 7443 bulb says on it 12v 21/5w...so how is that one turning on if it only get 5 volts?

      any way around this

    2. Member
      Join Date
      May 17th, 2012
      Location
      NY
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      294
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      2012 Turbo Beetle
      10-16-2012 09:49 AM #2
      Incandescent (plain old filament bulbs) can run on lower than specified voltage. They simply won't be as bright. If you ran your stock DRL bulb at 12V, it would be brighter than it is when plugged into the DRL socket on the car. LED bulbs (unless they are built with special controller circuitry) need a certain amount of voltage just to turn on. They're pretty much on / off. At 12V they turn on. Below that, they're off. So those bulbs will not work for our DRLs, since you've found the DRL voltage is 5.5V. The only "way around this" would be to run a 12V supply out to the DRL sockets, and use some sort of relay to turn them on. Probably not worth it (to me, maybe you really really want LED DRLs). I would try to find some different bulbs. Most likely, LEDs will not work in this application (without further wiring modifications). You could try some 6V LEDs if you can find some in the correct socket, but still no guarantee it will work.

      GTarr

    3. Member JR Martinez's Avatar
      Join Date
      Feb 25th, 2003
      Location
      TX
      Posts
      429
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      2015 Golf 1.8 T Sport package, Fender, Sunroof.
      10-16-2012 11:37 AM #3
      Like Pre year 1966 6V Bug lights ?
      2015 Golf TSI 1.8T Pure White w/Sport Package Body Kit,
      Sunroof, Fender Audio, Madrid Wheels.
      2006 Harley Davidson Dyna Super Glide

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