One morning a couple months ago, I got in my 1997 boxster and opened the door to get in. When I tried to shut the door, the window got in the way of the upper sill. When I pressed the window button to go down, it moved about 1 cm and then made a high pitch noise and buzzed, and then stopped working. Since then the window has not moved. It makes no sound when I press the window button. This is only the driver side door. Passenger window still works fine.
I took the door apart to see what was going on. I took out the motor for the window and tested the wiring harness. It was receiving electricity when I pushed the window control button. Then I tested the motor separately. It worked fine when current was applied directly to the leads on it. I thought it must be the small control unit attached to the motor. This contains a rather complicated chip which receives power from the 8 poles on the wiring harness and puts out power on the 2 motor poles.
I ordered a new motor because I assumed this control unit was broken. When I got a new motor, I installed it and the window still did not work. This really confused me. After this failed, I sent the new motor back.
Sound like a worn out window regulator. Try to move the door glass up and down, if it moves a lot then u will need a new regulator, the glass will have to come out. This is about a 2.5 hour repair time. You can buy the regulator without the motor. Unbolt the motor from the regulator with the wires hooked up and see if works with the window switch.
July, 2, 2010 AT 6:28 PM
The problem is that the motor does not spin when it is plugged in and I use the window switch.
July, 2, 2010 AT 6:53 PM
Check the fuse for that window motor and make sure its good. You could have a bad ground also or you could have gotten the wrong motor. You can test the circuit by swapping the motor from the right side.(The connector is the same and will hook up)