Just got the 2002 XK 8 out for summer. Top and rear quarters went down no problem but when I put the top up only the drivers side came up. I have checked the fuse(20 in the boot).

 

They are run by a pulley system with a cable- take a look down there and see if the cable has come off.

 

Easier said than done!

Just last week I finished repairing my pulley system. It's a fair bit of work to get to the window regulator. Not particualrly hard work, but plenty of steps.

@Simon Galbraith, can you hear the motor going near the window? Can you hear any weird noises sounding like a metal wire kind of banging around? Can you fairly easily pull the window up and down by hand?