Hi,
Hey im in australia and its amazing as I have exactly the same problem for the drivers side (Right hand side). Mines a 93 318is, the problem for me is intermittent. One minute the drivers window works perfectly, the next it wont budge an inch. Ive gone through the same troubleshooting so theres no prob with the switches as ive tested them by swapping and also I hear the clicking sound as well. Though when mine is stuck the open / close 1/2 inch move does not work either.
Ive taken the door trim off and removed the cover of the black regulator boxx and yes get the clicking as well. Have disconnected the motor as you said and it did start working again. The only response ive had is the std you need a new motor which is $800 in australia - *YUK* and seeing as it works perfectly when its operational i dont beleive its the motor but some small electrical gremlin.
To be honest this problem is really annoying the hell outta me cause its totally unpredictable, itll work fine when i leave home and then mid way just get stuck in the up position and i cant work out a fix for it at all. One thing i do find - and I dont recommend it is that when my window is not working, the best approach for me is to slam the door hard and then all of a sudden it starts working again. How stupid is that! Anyways the only responses ive had is get a new motor but i dont want to fork out $800.00 for a new one, so would be interested to see if you get to the bottom of this
I really am at a loss myself.
By the way I have replaced the comfort control relay and that made no difference to this problem.
Hey and also, pulling off the door trim (ive done it numerous times to fiddle round behind at the motor), have you found that the glue has perished and the cardboardy bits fall off? this has happened to me - i have also busted some - 50% of the clips so now the door isnt secured properly, just another annoying by product i guess grrrS!
Any further info on this hugely appreicateD!