High Beams turn the lights off - 1990 200

mike mikemk40 at yahoo.com
Mon Aug 20 16:30:43 EDT 2007


Mine failed in the same way, on dismantling the switch
I saw one of the contacts had overheated and sunk into
the plastic that should support it.

I did repair it by building up the melted plastic with
glue and a bit of bending on the contact.

I also relayed everything to take the load off the
switch (I was running 160/130 bulbs with 100W mains.)

mike
--- Vittorio Bares <Vittorio.Bares at nuance.com> wrote:

> Thanks all.
>  
> It does turn out to be the switch - reaching in w/a
> small screwdriver I was able to operate the hi/low
> beam by moving the contacts. In high beam position,
> a small movement would turn on the lights.
>  
> So...how much should I expect to pay for the switch
> (used)? Or is it best to just go with new?
>  
> And yes, I did have higher powered bulbs (doh) - so,
> I'll be relaying once I get the switch - as well as
> adding aux lighting that I think I'll splice into
> the current headlight set.
>  
> Vittorio -
> 
> ________________________________
> 
> From: LL - NY [mailto:larrycleung at gmail.com]
> Sent: Fri 8/17/2007 8:55 PM
> To: audi at humanspeakers.com
> Cc: Vittorio Bares; quattro at audifans.com
> Subject: Re: High Beams turn the lights off - 1990
> 200
> 
> 
> Huw is right on the colors of the headlight leads.
> And, in case you hadn't
> figured it out, brown is ground. As for contact
> cleaners, try DeOxit. I believe
> the red is for mixed metals, since we don't know
> what's exactly inside the 
> switch. 
> 
> HTH,
> 
> LL - NY
> 
> 
> On 8/17/07, Huw Powell <audi at humanspeakers.com>
> wrote: 
> 
> 
> 	> Perhaps someone has already diagnosed this
> problem.
> 	>
> 	> Low beams work fine
> 	>
> 	> Pulling the lever to flash the high beams works
> fine
> 	>
> 	> Pushing the lever forward to engage high beams -
> turns the lights off 
> 	>
> 	> I'm suspicious of the switch, and from reading
> the wiring diagrams - I
> 	> believe the yellow wire coming from the switch
> should give power to the
> 	> high beams?
> 	
> 	As I recall, yellow is low, white is high. 
> 	
> 	And, yes, I'd suspect the switch.  Try cleaning it
> (squirt some "stuff"
> 	into it and operate it a few times.  Don't use
> "stuff" that attacks
> 	plastic, of course).
> 	
> 	--
> 	Huw Powell 
> 	
> 	http://www.humanspeakers.com/audi
> 	
> 	http://www.humanthoughts.org/
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