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Here's a description the sun roof
Power Sunroof System Components
The power sunroof system consists of the following components:
• Sunroof module
• Sunroof switch
• Sunroof motor, with 2 hall effect sensors and limit switch
• Sunroof window
• Sunroof sunshade panel
• Power supply for the sunroof module: RAP 25 A
• Ground G402
Override
The override function is used when needing to force a closing of the sunroof window. To override the system:
Turn ignition to ON.
Rotate the sunroof switch to the close position.
Press upward.
The sunroof switch data 6 circuit, or override circuit, will become grounded at the sunroof module. As long as the sunroof module sees this input, it will continue to slide the sunroof window to close, regardless of the other sunroof switch data circuits inputs.
Can you hear the roof's motor working? If not then first check the fuse box for any blown fuses. I'm talking about the one on the inside of the vehicle, under the dash.
Replace any blown fuses, and lubricate the window's mechanism and runners.
If no fuses are blown, then check that there is power to the sunroof motor. If there is power, then you have a blown motor. If no power present, then trace wiring back to fuse box and then switch mechanism.
Some sunroofs have a open switch like the drivers window. You push it and the window will open automaticly. The button on your sunroof could be jammed so even though you can close it as soon as you release it, it will auto open on it's own.
Check your wires and fuses, I am having a similar problem myself as the windows open, but not the sunroof and this is a feature that VW had on most of these models with power locks, even my 96 Gti did it. I will repost with what fixed it ASAP.
The windows and sunroof have relays (mounted under the dash above the fuses) that are probably corroded... also there are thermal circuit breakers that are supposed to reset when cool but also may also be corroded... if these are good then it's a wiring issue under the console... Hope this helps...;-)
When you press the button do you hear any noise coming from the sunroof? If not and you say you check the fuses then more the likely the motor burned out and you will have to replace it. But if you hear noise coming from the sunroof it may be that the sunroof came off track or is simply jammed for some reason.
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