Not much help, I'm afraid, but it sounds like the window is jammed rather than the regulator is faulty. Has the window dropped out of the guides? Are they blocked with something?
I'm pretty sure I have seen some diagrams of the window mechanism somewhere because I am wanting to adjust them at some point.
Someone is going to know something about this so I hope they come along soon
You may be able to raise the window by giving it a helping hand if your try to operate it...just to get the window up until you get the parts.
Just watch your fingers though!
Sundance
Hi Hogweed.
Are you sure that the glass is still in the slides of the frame as I agree with you that if the sprocket was stripped it wouldn't try to force the glass up . My ZR had exactly the same fault as the gorilla at Longbridge that built it didn't line up the glass in the guides and it jammed as I drove off the forecourt !
John
From memory as I had to replace my drivers door central door latch , the front of the guide ( I think ) is fixed /part of the door and the rear nearest the door handle is adjustable with a nut that is or should be in line with the glass at the lower part of the inside of the door . 13 mm nut I think but it was February when I did it so , my brain fades after a bit .Tis mi age ! !
John