B5 Models Please discuss all 1996 - 2001 B5 A4 topics here...

Weird Headlight Stalk Problems

Thread Tools
 
Search this Thread
 
Old Dec 17, 2012 | 07:00 AM
  #1  
AudiTurbo's Avatar
Thread Starter
|
2nd Gear
Joined: Sep 2006
Posts: 1,273
From: Lexington
Default Weird Headlight Stalk Problems

So I have recently installed some silver star fog lights in my pre facelift headlights and now I have some problems. After install they worked perefectly for 2 days, but when I drove home and parked the car the lights wouldn't come back on. This is my second stalk install and inteas of replacing I took it off and cleaned it. I noticed the plastic was a little burnt and the copper piece was in full contact, so I cleaned everything up and reinstalled. After trying I noticed that it will come on if I wiggle it a ceratin way. After I get the headlights to work I can turn the headlights off and on a 100 times and they work, but if I let the car sit over night it take a little playing of the switch to get them to work. Can anyone explain why after I get them working they work until the car sits for a while and can I put a relay or fuse in line to take away some resistance?
Thanks
 
Old Dec 17, 2012 | 07:22 AM
  #2  
CCA4's Avatar
Administrator
Joined: Jun 2008
Posts: 7,588
From: NW PA
Default

I think ImTheDevil either wrote or is working on writing a DIY guide for adding relays to the headlights to keep that little bastard from melting. The longer you keep the headlights on the softer that little piece of plastic gets, which is why they work sometimes and not others. No real good way around this besides replacing the stalk and using relays.
 
Old Dec 17, 2012 | 07:45 AM
  #3  
ImTheDevil's Avatar
Administrator
Joined: Jul 2006
Posts: 11,670
From: Binghamton, NY
Default

Yup, the plastic is continuing its death melt. If you disassemble the switch again you'll see more warpage in the plastic. Get another switch from the junkyard and swap it in.

Haven't written the actual DIY yet due to ridiculous time/labor demands on me at work this year (our company's 700,000 sq ft building and a lot of assets were destroyed in a flood in September 2011) but the gist of it is this:

Get two relays - I bought 20A
Find the low beam wire in the headlight harness bundle - cut it and attach the "car" side to the switch input/trigger terminal, and attach the "bulb" leg to the switched leg/output terminal. Apply battery power to the source terminal. Wire the ground terminal to a solid chassis ground.

This takes the headlight-level current out of the switch and flows it direct from the battery, through the relay, to the bulb, and reduces the current through the switch to the mA range. Install these with a replacement switch and you should have no worries from then on.
 
Old Dec 17, 2012 | 08:39 AM
  #4  
AudiTurbo's Avatar
Thread Starter
|
2nd Gear
Joined: Sep 2006
Posts: 1,273
From: Lexington
Default

But once I get the headlights on I can turn them off and on a hundred times and they still work. I thank you for the info devil, but I don't know if I really know how to do that properly. I'll have to show my dad and see what he thinks. Do you think there is a DIY somewhere?
Thanks for all the info
 
Old Dec 17, 2012 | 08:48 AM
  #5  
ImTheDevil's Avatar
Administrator
Joined: Jul 2006
Posts: 11,670
From: Binghamton, NY
Default

There isn't yet that I know of but I will do my best to get one written up as soon as I can.
 
Old Dec 17, 2012 | 08:52 AM
  #6  
jonbonesjones's Avatar
Moderator
Joined: Aug 2011
Posts: 2,380
Default

Relays are easy as pie to hook up, two of the connections are already there. Just add a constant power and ground.
 
Old Dec 17, 2012 | 08:56 AM
  #7  
AudiTurbo's Avatar
Thread Starter
|
2nd Gear
Joined: Sep 2006
Posts: 1,273
From: Lexington
Default

Originally Posted by ImTheDevil
There isn't yet that I know of but I will do my best to get one written up as soon as I can.
Thank you so much.

In the mean while I did find this Headlight switch contacts
 
Old Dec 17, 2012 | 11:07 AM
  #8  
ImTheDevil's Avatar
Administrator
Joined: Jul 2006
Posts: 11,670
From: Binghamton, NY
Default

Look in the DIY subforum here on AF - I put up some info on the switch internals that may help here and there as well.
 
Old Dec 17, 2012 | 11:19 AM
  #9  
AudiTurbo's Avatar
Thread Starter
|
2nd Gear
Joined: Sep 2006
Posts: 1,273
From: Lexington
Default

Thank you. I have already removed the switch and cleaned it.
I didn't see an updated DIY though
 

Last edited by AudiTurbo; Dec 17, 2012 at 11:25 AM.
Old Dec 17, 2012 | 11:33 AM
  #10  
ImTheDevil's Avatar
Administrator
Joined: Jul 2006
Posts: 11,670
From: Binghamton, NY
Default

I've had enough issues with my switch in the past that I decided to do the relay install. I'll get pics and write it all up soon as I can.
 



All times are GMT -4. The time now is 12:34 PM.