I have a 2001 beetle with battery drain problem we have traced it down to fuse in socket 14 in the fuse panel which was identified as for interior lights but now the power windows do not work.

SOURCE: my interior lights and door panel lights won't go out

I have the answer to your problem. One of 2 things. Cut wiring harness in the door accordain between the frame and the door. Or most common a defective door latch. The door latch contains the microswitch that tells the comfort module that the door is open or closed. If the lights stay on this means the switch thinks the door is always open. Also the alarm will not activate. First make sure no cut wires then if not replace the door's defective latch.

SOURCE: interior light bulb on vw beetle

I had the same problem. Found the solution online - The Golf Mk IV has the same fittings. Pictures here: http://uk-mkivs.net/forums/t/255147.aspx

SOURCE: 2001 beetle - keep blowing the 10 amp fuse for

When a fuse blows it means more demand for power is comming through than the 10 amp fuse can handle.Try a 15 amp fuse if the problem is NOT serious you can get away with this.If the 15 amp fuse blows you have a short in your power window circuit.

SOURCE: Passenger side window (2000 VW Beetle GLS -

that black metal housing is riveted in place, you might have to drill them out and replace with bolts or something of that nature to hold it inplace. make sur eyou are getting power to the window motor to crank up and not just down, is the motor bolted all the way down.

SOURCE: The driver side window on my 2001 Passat won't roll up.

Pop out the switch on the door that has the issue, more than likely switch has gone bad and needs to be replaced. you will need to check it with a meter to see if power is getting to the switch and also to check when switch is activated if power goes through switch