A8 / S8 (D3 Platform) Discussion Discussion forum for the D3 Audi A8 produced from 2003-2010 and Audi S8 produced from 2006-2010

D4 Headlights on a D3?

 
Old 06-13-2015, 05:02 AM
  #41  
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Hello Dave,
That is not what I am talking about, I know what the Euro parking lights are, as I myself had a thread on that issue a while back, what I am saying is that as seen in this video made by Louis the fog light blinks opposed of turn signal, and I have seen this before on other A8's, I don't know why, maybe Louis can tell us why his was this way.

Johnny J J


Originally Posted by dvs_dave View Post
That's the euro spec parking light feature, where you can have parking lights on, on one side only selected by the indicator stalk. It's not normally the fog lamp though as it draws too much power, rather the small 5W sidelight/parking bulb in the headlamp unit, and one of the tail lamps.

Last edited by JohnnyJ A6Q; 06-13-2015 at 05:12 AM.
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Old 06-13-2015, 07:17 AM
  #42  
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If it's the same as Louis's then it's Jerry rigged electrics. I remember us all discussing at the time.
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Old 06-14-2015, 09:11 AM
  #43  
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Default It's a simple circuit design... Here is how it works

task:
- fog lights work as designed with LED bulb - turn on by fog light switch.
- fog lights blink with blinker.

- problem: can't connect fog light bulb to 2 different positive terminals: blinker & fog light - because if fog light switch turns on at night, blinker will be constantly on.

Solution:

- use positive terminal of blinker as negative of fog light bulb - which is always low, only high when turns on = 12V.
- Fog light will turn on at night because the negative from blinker is low - but when the blinker is on = 12v - the negative of fog light led bulb = 12V ==> the voltage across LED bulb = 12V-12V = 0V=OFF, that's why it's off.

Therefore - if blinker is on and fog light switch also turned on - fog light bulbs are opposite to the blinker bulbs.

In the Video: The Fog Light LED bulbs positive are connected to both parking light and driving light positive since only one can happen at one time - either parking or driving and not both. The negative is still connected to the Positive of the Blinker bulb. Hope this makes sense.


Cheers,

Louis

Last edited by ltooz_a6_a8_q7; 06-14-2015 at 09:25 AM.
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Old 06-20-2015, 09:44 AM
  #44  
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Originally Posted by RangeK1D View Post
That LED retrofit is very nice! The 2015 LED design would look absolutely killer on our D3 headlights. Check out the images below, food for thought.




To my eyes, that looks simply awful, whether it works well or not.
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Old 02-11-2017, 02:27 AM
  #45  
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Originally Posted by dvs_dave View Post
He's done such a great job wiring it all up that the left fog light is out, but the corner marker is on, and opposite on the other side. Would like to see a pic of his dash too. I bet it's lit up like a Christmas Tree with bulb out and headlamp range control errors .
Actually I think the fog light is on, because the steering wheel is turned that way. Its cornering light
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Old 02-11-2017, 04:55 AM
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Originally Posted by Carsten Haag View Post
Actually I think the fog light is on, because the steering wheel is turned that way. Its cornering light
That's a good point. Forgive us in the US, cornering lights aren't enabled from the factory, if I recall.
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