Help! The passenger side front electric window won't function on my 1999 Alhambra (sharan/galaxy). neither switch can make it function, worst thing is that the window is stuck fully open!

Wires look fine behind the rubber shield at the door post. I tested the large red/yellow wire at 12V and the large brown wire is earthed correctly. No noise at all when switches are operated.

I'm almost at the point to dismantle the mechanism and lift the window up manually and block it with wood. But even that appears to be difficult to achieve.

I assume that it's just a coincidence that it stopped functioning exactly when i changed the battery??? All other electrics are OK, and fuses OK.

Does anyone know how to diagnose whether it's the electric motor?There are so many wires coming into the control unit!

Any help would be greatly appreciated.