window motor- internal "gearbox" jam?

[Kurt Deschler]

Brett,
I had one regulator in my 89 200 that was jammed internally. Turned out 
that the cable had frayed on one side of the spool and wrapped around 
the cable on the other side. In that case, the cables still moved a 
little. The motor could also be sticking due to a bad bearing or open 
winding.
 	-Kurt

> Message: 3
> Date: Sun, 9 Apr 2006 22:09:14 -0400
> From: Brett Dikeman <brett at cloud9.net>
> Subject: window motor- internal "gearbox" jam?
> To: Quattro <quattro at audifans.com>
> Message-ID: <1001EB84-C20E-400B-B6E2-87DF359D92B6 at cloud9.net>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> Years ago I parked the 200q20v and didn't drive it for a good 6
> months or so.  When I fired it up- aside from the battery that gave
> out shortly thereafter (I now know of maintenance chargers!), the
> only MIA feature was the driver's side rear window.
>
> It's never really bothered me, but this year I decided to do
> something about it.  The mystery was that it was clearly drawing
> amps- not a doorjam wiring problem, not a switch problem.  Removing
> the door panel+glass/top half, I got to the regulator, and decided to
> try and investigate without getting the cables all out of whack.  So
> question @ 1 is: how does the regulator itself come apart once you
> have the cover-plate off?  I know I completely disassembled one a
> VERY long time ago, but it was off a 5000...and either they changed
> the design, or I just haven't found the "trick" I found with one on
> the bench.
>
> Wwith the electric motor retaining screws removed, the motor is
> visibly putting torque on the drive mechanism, as the motor case
> shuffles slightly with up/down switch actuation.  With the cover off
> the regulator, I don't see the main "spindle" moving in the
> slightest...so I'm pretty sure the problem isn't with a jam in the
> window itself.  This brings me to question #2: has anyone had a
> failure where the "gearbox" failed/jammed?
>
> Thanks!
>
> Brett