Drivers side electric window is now working. I made a steel plate to reinforce (repair) the plastic part. Unfortunatly I forgot to take photos of the finished article before fitting! but it works well. However I have a problem with the passenger side. I think I have a broken wire somewhere.
The motor works freely from the drivers switch but will only go one way from the passenger switch. I have swapped motors and all the switches around but it still refuses to go in both directions!!!!!! Totally flumped!!!!
If you check my wiring diagram, you will see that BOTH drivers and passenger door switches for the passenger door window, have to be in good condition for the window motor to work. It may sound odd, but the power to the passenger door switch comes from the circuit board (green plug pin 6) but the 'earth' goes all the way back across to the drivers door switch first and then to the real earth. So there is no direct earth at the passenger door. Also when you press the drivers door switch to operate the passenger window the power now comes from the drivers door switch 3B, (circuit board green plug pin 3) NOT the passenger one! Therefore you cannot easily test the motor using the wires in the passenger door alone.
Again referring to the wiring diagram, the two wires to the motor itself are initially dead, and when one of the switches is operated the power will go to one side of the motor and the other will connect to earth. If you reverse the switch to operate the motor the opposite way, the power and earth are switched over to make the motor operate the other way. So either wire can be power or earth depending on how the switch is operated. The reason the earth goes back through the drivers door switches are to prevent any shorting. Suppose the passenger switch was operated for the 'down' direction just as the drivers switch was operated for the up direction - you could be connecting power to earth directly and cause a short circuit! But because the drivers door switch is the route to earth for the passenger door switch, that cannot happen. Once the drivers door switch is operated the passenger door switch looses its route to earth and you cannot get a short.
Now since we know your passenger window will operate 'freely' as you put it, from the drivers door switch (and I assume that means up and down?) then we know that provided no-one has altered the wiring from the original, then all the wiring between the drivers door and the and passenger door switches appears to be good, and also between the passenger door and the passenger door motor is fine. The circuit would be this: drivers door power 3B to 35Y across to passenger switch 35Y then to 35X and to motor, and the motor 37X back to passenger switch and then 37Y back to drivers switch 37Y and finally to earth 110B. To go in the opposite direction we have 3B to 37Y to 37X to motor and motor 35X to switches 35Y to earth 110B.
From the passenger door switch the circuits would be this: power 3A to 35X to motor, and motor 37X to 37Y back to drivers door and to earth 110B; or for the opposite direction 3A to 37X to motor, and motor 35X to 35Y to earth 110B again via drivers door.
Since the operation from the drivers door you say is good both up and down, we know the circuits across the car must be good and also the wiring to the motor must be good. A process of elimination says that only leaves the fault to be in one of the two switches that were connected for operation of the passenger door window.
So connect all three switches one after the other to the drivers door window motor and check the operation of the drivers door window up and down. With one of the switches, it should only go one way and that will be the faulty switch. You might ask 'why test the switches on the drivers door window?' and the reason is simply that window only requires one switch and has direct wiring so eliminates any other complication.
The only other possible way this fault could result, is if someone has altered the wiring from the standard original wiring, and I would have to know exactly what has been done to try to work it out. Since the system has been apart before by someone who doesn't understand it (witness the damage done to the doors) this possible wiring alteration is certainly a possibility!
Roy