Here's what I had found a few months ago, I copied and saved as many posts as I could. The most basic solution worked, l got lucky this time.
Re: Electric window problem
I had this with mine, if you do a search you'll find the answers - in short, it may be that the auto drop cam/switch needs adjusting (assuming it's a post-2000 car). The clicking is caused by the switch not engaging properly, which means the cycle isn't completed and gets stuck in a loop trying to move the window. If you have the card off, loosen/remove the cam next to the microswitch - you can see it through the small cutout near the top of the panel, in the middle. Press the microswitch a few times, and try the window again - some random combination of switch pressing 'clears' the system and it should function again assuming the motor is intact.
You have to loosen the cam next to the switch, there's two nuts holding it on. Once you slacken them, the cam can be moved to the side to allow the switch to open.
Be warned - it's a pain to refit the regulator and window, not so much getting it all back in but adjusting the position of the glass. Lots of adjustment points, took me several days to get it exactly right.
If you hear a clicking sound, that means your problem is mechanical and NOT electrical.
ill start with problem 1: i listened for the clicking sound. there were indeed clicking. i dismantled the door att the electric motor. i took it of, cleaned it! it reacted and the electrical part seems to be working fine, but the plastic power transmission part, that converts the electrical engines movement to actually lowering the window etc seems to be broken. I have to either buy new complete engine but id prefer to buy the plastic part. so the question is, which modells share the same electrical engines for the power windows as the GTV/ Spider?
have you checked the multipin plug from the door to the a-post pillar?
unplug, clean and plug back in again.
Not sure which multipin plug you're referring to, are these the ones that connect directly to the window switches?
This is the plug found where the door attaches to the body (A Pillar), hinge points.
The electric windows on the GTV are controlled by a blue control box above the glovebox. The relays are soldered inside and are not the conventional ones so can't be removed without a soldering iron. I ordered a new control box from Alfa, if I remember rightly it was less than 40 quid.
What got me out of a spot was taking off the speaker panel, removing te speaker and giving te window motor a solid thump with a hammer. It worked!!