electrical gremlins - power windows

[Swann, Benjamin R. (BSWANN)]

> From:	Swann, Benjamin R.  (BSWANN) 
> Sent:	Thursday, November 09, 2000 9:54 AM
> To:	'ankneys at hotmail.com'
> Cc:	'quattro at audifans.com'
> Subject:	electrical gremlins - power windows
> 
> 
> Stephen,
> 
> Sounds like you have ruled out the switches.  Good.
> 
> I guess you found out that you can get the window to go up by supplying
> power to the two terminals which go to the motor.I think a green wire, and
> a black wire.. they are the two terminals in the middle not in the row of
> three, I think they are numbered 4 & 5...reverse polarity for up or down.
> You can get power from battery under rear seat and some long alligator
> clips.  This will get you out of a pinchwith the oncoming storm.
> 
> I had the exact same problem with the '89 100 Q.  Could not locate broken
> wires , etc.
> 
> Started tracing.  I deduced that there was no return to ground when power
> was on.  This could have been anywhere in the path back through the driver
> door switch, and through the relay.  I don't recall offhad exact
> connectivity, but consulting the Bentley and methodiacally determining how
> the swiches work - eg. switch polarity on terminals 1-4 & 2-5 on up, to
> 1-5 & 2-4 on down(may or may not be correct since this is from memory, but
> giving you an example).
> 
> Since the problem could have been anywhere in the return path to ground on
> the terminal that was responsible for carrying current to ground in switch
> up position, I added a ground wire spliced into that wire and connected to
> one of the motor screws(grounded).  This has fixed the problem.
> 
> Hope this information brings you closer to a solution.  Basically, I
> didn't necessarily fix the problem but worked around it.  If you do such a
> workaround, make sure every thing works properly,before putting the door
> back together, and that you are not shorting anything out or to cause
> something else not to work properly.
> 
> Regards,
> 
> Ben
> _______________________________-
> 
> From: "Stephen Ankney" <ankneys at hotmail.com>
> To: quattro at audifans.com
> Subject: electrical gremlins
> Date: Thu, 09 Nov 2000 09:57:21 GMT
> 
> [first electrical 
> problem. Went to roll down all the windows in my 5000 today and all of
> them 
> except the rear drivers side would go down...question is: where could the
> problem be?]
> 
> [Mechanic thinks it's a bad window switch in the front and I tend to agree
> with him...]
> ***I disagree with your mechanic - troubleshoot methodically with a
> multi-meter.  You should be able to do this without taking the door apart,
> which I of course found out after taking the door apart.  Oh well now I'm
> good at taking these doors apart.
> 
> [I'm thinking of going to the junkyard again and getting one of those
> drivers side quad window switch control panels and intercahnging pieces
> and seeing if that makes a difference...am I on the right track?] 
> ***that would be shotgunning the problem...may fix, may be a waste of time
> and money$
> 
>