Re: volvo s80 t6 1999 sunroof not operating, no noise
I know this problem is old, but with some volvos the sunroof problem can be fixed by locking and unlocking the Volvo 3 times. If I'm not mistaken its kinda like a hard reset for a Volvo. I've done this when my S80 has done this before.
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When you turn switch to the slide back position, do you hear the motor running ? If yes, might have a blocked or bad track. This will require you to remove trim covers and glass to have access to the track. Once all parts removed, turn the switch to open as you look at the motor and track move.
Try resetting the electrical system by locking and unlocking the doors with your key in the driver's door 5 times in a row. A service manager at a Volvo dealer showed me this after they did some work on my car and on the way home the sunroof wouldn't close.
I have a 2001 S80 that I have to reset the electrical system like this every time I disconnect the battery. All kinds of stuff stops working...sun roof, door locks, lights, radio, windows, etc. Just reset like described and everything should start working again.
Not positive it is the same thing, however, when setting up my iPOD adapter to the radio, I made the mistake of not following the instructions to the T, and it caused my sunroof to stop working... after a day (which I later found out gave the system enough time to "reset" and connect), I turned on my stereo, pushed the 3CH to Dolby Surround, and that did the trick. It's been about a year... and I've had no problems with the sunroof!
Dear cz50001: there are only a few things that you, a weekend warrior can do to diagnose and/or fix the problem on your car.
Unfortunately the newer cars get, the more complex they get.
Unfortunately, your car is one which falls in the more complex category. Your car is designed with a "BODY CONTROL MODULE". This little gem gets input from nearly every electrical component in the car including the sunroof. In terms of what you can do to check it out: The fuse box inside the car has roughly 24 fuses positioned vertically 12x12. The fuse located at the lower left side of the box is a 10A "red in color" is for the sunroof. Remove it and look through it to see if it has been burned through the center. If it has, replace it and try the sun roof. If the fuse blows again, you have a short and it would be best left to a professional.
There is another set of circumstances which can occur that will render the sunroof inoperable. If the battery is disconnected or if the sunroof motor had been disconnected, the sunroof will stop operating. To reset the sunroof memory, with the key in the on position, push and hold the sunroof tilt switch in the forward (up) position until the sunroof is fully vented (tilted up) position. It should at that point operate normally. Should those two suggestions not solve your problem, it requires either a dealership with a specialized tool called CONSULT-11 to communicate with the BCM. There are some specialty shops such as mine equipped to deal with your car as well. However, most can not address this type of problem without this diagnostic tool. Good luck.