[V8] Electric window problems

[Buchholz, Steven]

Hey there Dan!  Been a long time ...

The V8 isn't any different from any other T44 in the operation of the
window switches.  It is a very interesting method that is used to
provide "ganging" of the switches and rear door lockout ... basically
the two wires fed from one switch to the next are both nominally at 12
volts, the switch grounds one or the other to activate the motor in one
direction or the other.  If you can make the window go one way and not
the other it implies that only one leg of the DPDT is sending 12v from
the switch on the drivers door.  There are no other relays in the
circuit to any window other than the driver's door ... it is all done
through switches ... and from your description I would suspect that it
is the switch in the driver's door armrest that is the culprit.  One
other thing to keep in mind is that even a new switch can be faulty, so
there's some chance you swapped a bad switch with another bad switch ...
and it is the one in the passenger's door.  

Steve B
San Jose, CA (USA)
> 
> Hi...   I am having a problem with a 1993 V8 Quattro.
> 
> Passenger side window will go down, but not up.  Has the same 
> symptom from both driver's side switch and switch on 
> passenger side.  I pulled the switch on the pass side and 
> replaced it with a known good switch.  Still wouldn't work.  
> So, I looked at the wiring in both the passenger side and 
> driver's side door jams and they all appear to be fine (no 
> visible breaks).  So, then I pulled the door panel and pulled 
> the window regulator loose.  I was able to reverse the green 
> and black wires to the window regulator (which switches the 
> polarity and the direction of the motor) and was able to get 
> the window back up, but still not sure what is causing the 
> window to go down, but not back up.  
> 
> I'm thinking there must be a relay or something that isn't 
> working properly.  I also heard someone say that if the 
> driver's side window switch isn't functioning, the passenger 
> switch won't either?  Is this correct?  If that's true, Audi 
> must have put team door handle in charge of wiring for this car.