[V8] Sunroof woes

dsaad at icehouse.net dsaad at icehouse.net
Wed Dec 6 18:24:50 EST 2006

There should have been an allen key in the sun roof motor cover. I don't see it
in your pictures, but just find a metric allen that fits in the center of the
white gear.
Next unlock the lever arm. Now you can turn the allen to manually move the sun
roof. Position it so it is closed and flush with the roof. If the timing of your
motor is way out of whack, you may have to remove it and turn the allen key to
give yourself more adjustment room. Once the roof panel is properly positioned,
again remove the motor. Turn the key all the way in one direction. It stops in
the center position between flipped up and opening, and of course at full open
and full flipped up. Once you determine the center stop position, lock the lever
arm again. Now run the motor with the sun roof switch. You should observe it
stop at the three positions - full flipped, center (or closed), and full open.
Again leave it in the center closed position. Now bolt the motor back up to the
roof, and if every thing is working OK, your sunroof and motor should be "in
time". If it does not work with the motor/switch, you may have a problem with
one of the micro switches. I have had them go bad on every Audi I have owned,
but I have always been able to carefully disassemble the switch and clean the
contacts. This operation is not recommended for the fat finger types - it is a
very delicate operation and tiny parts easily fly away.
It should work in manual mode though - if you again unlock the lever arm, you
can operate the sun roof with the allen key as a hand crank.

BTW, a lot of this procedure is in the owners manual. The rest is in the service


Quoting Scott Simmons <indischrot at gmail.com>:

> Hey list,
> It was a nice enough day that I could work on the car without being
> frozen so I pulled the sunroof motor cover to see what was under there.
> I found a sunroof motor in the trunk when I got the car (almost a month
> ago) and was curious what was in its place.  There's definitely a motor
> up there and the sunroof works great when operated manually.
> I also found where that mystery connector goes.
> Pictures:
> http://i10.photobucket.com/albums/a143/indischrot/audi/sun_motorposition.jpg
> After I was done playing with the sunroof, I found a spot where the roof
> seemed closed; between the two open cycles but I'm not sure.  Where
> should that little grey wheel be?  Should either of those microswitches
> be closed?  I just don't want water leaking in.
> This is where the connector obviously came from.  I tried to figure out
> where the brown/grey wire goes but the Wiring Diagrams at
> http://www.geocities.com/cobramsri/Wiring/ list different colors.  Any
> ideas where BR/GY goes and did the previous owner hook up the Red/blue's
> correctly?  Anyone have a wiring diagram for a 90 V8 sunroof?
> http://i10.photobucket.com/albums/a143/indischrot/audi/sun_wires.jpg
> http://i10.photobucket.com/albums/a143/indischrot/audi/sun_wires2.jpg
> http://i10.photobucket.com/albums/a143/indischrot/audi/sun_wires3.jpg
> This is the state that the wiring is currently in and the only thing
> "jury rigged" appears to be the red/blue wires.  Everything else looks
> OE.  If I plug in the relay, the sunroof wants to retract backwards.
> Pressing the switch will stop the motor only momentarily (I did not hold
> down switch to see if it would stop it indefinitely, as I don't want to
> fry anything).  I want to fix the wiring first, then figure out what's
> wrong.  I want to check the switch to see if it's stuck closed, but it
> appears to be soldered onto the wires.  Is it replaceable?  Could it be
> the microswitches or something on the motor?  I apparently have a spare
> motor, don't know if it's good.
> What I want to do now is get the sunroof sufficiently closed as not to
> leak water/snow for the winter and possibly fix the wiring.  I don't
> care to have it working until March, at the soonest.  The small panel
> inside the sunroof, the one on springs, wants to stay open at all times,
> should it fold down when the roof is closed?
> Thanks a bunch,
> Scott Simmons
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