From memory , the windows are fused in pairs , with the front left window sharing a fuse with rear right and vice versa . So , if your rear drivers side window is working , it isn't the fuse .
Since you've got the door card off , the next step is to put a voltmeter across the motor terminals and see if voltage is reaching the motor when you press the switch - if you get voltage at the motor , you are looking at a faulty or jammed motor ; if the motor is jammed , you should hear/feel it trying to move and be lookingfor a mechanical problem with the mechanism - if the motor gets power but does not even try to turn you are looking at a faulty motor - I'm guessing here but think amotor from a saloon or estate might fit - new ones are pricey .
If no power is reaching the motor , and you have already confirmed fuses/switches are OK - I'd be thinking relays/wiring . I'd expect there will be one or more relays for the windows ( I'm guessing here but would not expect the little plastic switches to take the full motor current ) and would listen/feel in the relay box next to the fusebox as someone presses the window switches - if you can hear/feel relays operating when the other windows are operated , but not this one , you are possibly looking at a faulty relay . If a relay clicks for this window but no power reaches window you may be looking at wiring where it flexes with the door hinge - try holding the switch and moving the flexible cable channel - identify the colours of wire feeding the motor then try to find them at the other side of the hinge - very carefully stick pins in through the insulation to see if you can pick up voltage before the flexing part where they usually break . Bypass broken cable if neccessary .
Hope this is of some help .
