[urq] '83 A/C, burnt wiring smell

[Ingo Rautenberg]

Yes.  There is a relay behind the fusebox that gets really, really  
hot.  Can't say exactly which, but I seem to recall it's the 2nd or  
3rd from the left with the glovebox removed.  Not sure whether the  
relay in my case was defective, but I DO KNOW it was melting its  
socket.  In my case when I slowed down the whole interior of the car  
filled with smoke and I quickly removed the relay (which was useless  
in a car with AC system removed).  Don't have the IST documents in  
front of me, so I'll let someone else chime in...

Ingo

On Jul 17, 2006, at 7:34 PM, djdawson2 at aol.com wrote:

> Again, on my "new" '83...
>
> After a few hours of chasing wire routing, and after evacuating and  
> recharging the system (R406a, BTW), I now have an excellent  
> performing A/C system in this '83.  However, now that the A/C is  
> working well, I am getting the familiar early car stink of hot/ 
> burning plastic wire insulation inside the car after the A/C has  
> been on for about a half hour.  Turn the A/C off, and the stink  
> quickly goes away.
>
> My thoughts...
>
> When the A/C is on, the cooling fan on this car runs at a moderate  
> speed... full time.  This is the only additional electrical  
> accessory that operates when the A/C is on, except for power to the  
> compressor clutch itself, which is a fairly low current.  My  
> thought is that the source of the hot wires must be something  
> linked to the cooling fan system, but as yet, have been unable to  
> actually locate the hot wires.  My other thought is that maybe the  
> fan itself is drawing too much current due to its age, even though  
> it spins pretty freely by hand.
>
> Any '83 gurus have any suggestions on where to start looking?
> Thanks,
> Dave
> ______________________________________________________________________ 
> __
> Check out AOL.com today. Breaking news, video search, pictures,  
> email and IM. All on demand. Always Free.
> _______________________________________________
> Audifans urq mailing list
> Send posts to: mailto:urq at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/ 
> listinfo/urq
> Have an urq question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/UrQuattro
> Have an urq answer? ... Please help others by adding to the KB ...  
> all contributions welcome!