Sunroof Repair Instructions

My 1992 325i sunroof is not working. The fuse is ok. I'm wondering if
it is the switch or the motor. Is there an easy way to test/diagnose
the problem? Thanks!

More than likely the gear on the sunroof motor is stripped. One gear is
plastic and the drive gear from the motor is metal, which evetualy strips
the plastic gear. You can't buy just the gear, I tried. You nead to
replace the whole unit, wich is the motor and gear assembly and coast about
$250 US.
> wrote in message
ups.com...
> My 1992 325i sunroof is not working. The fuse is ok. I'm wondering if
> it is the switch or the motor. Is there an easy way to test/diagnose
> the problem? Thanks!
>

Sounds like the motor may not be getting voltage to run at all. The
original poster didn't say the motor was turning so this is just a
guess on my part. Check for voltage at the switch. If there is voltage
there, then actuate the switch and look for voltage on the other side
of the switch. If there is voltage there, actuate the switch while
looking for voltage at the motor. If there is voltage at the motor and
it's not turning, the motor is most likely bad. On my 89, there is a
relay in the sunroof circuit that located right next to the motor. If
there's no voltage at the motor but there is voltage at the switch,
this relay is most likely the fault (if there is one in your car).

On Mon, 11 Sep 2006 02:52:18 GMT, "Mike Bliss" >
wrote:

>More than likely the gear on the sunroof motor is stripped. One gear is
>plastic and the drive gear from the motor is metal, which evetualy strips
>the plastic gear. You can't buy just the gear, I tried. You nead to
>replace the whole unit, wich is the motor and gear assembly and coast about
>$250 US.
> wrote in message
oups.com...
>> My 1992 325i sunroof is not working. The fuse is ok. I'm wondering if
>> it is the switch or the motor. Is there an easy way to test/diagnose
>> the problem? Thanks!
>>
>