Sun is out!, so I decided to investigate non working rear electric window. The usual scenario, just a click when the swith is operated, so off with the door panel, undo the switch from the panel and re-attached for testing later, this is important, as the drivers switch won't operate the rear window without this switch in place, it completes the circuit.
With the motor assembley undone,(three 10mm bolts) the whole lot moves around inside the door easily, and allows you, just, to access the three star head screws that hold the motor itself to the regulator. After undoing them, Slide the motor out.
I switched on the ignition, and operated the switch, the motor worked in both directions
At this stage, I sprayed WD40 into the regulator, down the hole where the motor should sit. When it dripped out of the bottom of the regulator casing, I sprayed down the cable tube, just visible where the window meets the top of the door, and also the circular fulcrum, also visible.
After all the dripping had ceased, I squirted a dollop of silicone grease into the hole in the regulator, and also cleaned up and re-greased, with silicone grease, the worm drive on the motor shaft itself, and the fulcrum.
I also cleaned and re-greased the large slider in the center of the door, on which the window rises and falls, the grease on here was very hard, and not at all greasy
Had a coffee, now in order to replace the motor into the regulator, it is necessary to hold the motor in position as close as possible, and flick the switch just a little which re-engages the worm gear. keep atight hold until the screws are back in, and relax while you tighten them!.
At this stage, re-fit the whole mechanism back into the door, lightly tighten the three nuts, and give the window a quick test. It should now operate correctly. Tighten up the bolts, and put your door back together.
I hope this helps someone else, it's not always required to buy a new motor, quite simply, the old grease dries out over time, and locks everything up, I shall be operating the rear windows a little more often now, just to stop any further ceasing.
It sounds long winded, but is very easy and took me about half an hour, including coffee and fag breaks
