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Old 03-29-2013, 07:08 PM   #1
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2001 Cherokee
Default Power window sticks

I searched the forum here for power window issues, all the threads I found were for electrical problems; I think mine is mechanical.

The driver's window feels loose in the track and sometimes stops halfway up and then won't go up or down. If I lift up/push down/wiggle the glass, it will eventually "catch" and start working again. The times when it won't go up or down, the motor is not turning. I think there might be a limit switch in there somewhere and the window "thinks" it is all the way up or down and won't respond to the switch. I couldn't find anything that looks like that.

I took the door panel off and couldn't find anything obviously worn, bent or broken.

Any ideas?
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Old 03-30-2013, 03:42 AM   #2
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There are no limit switches. It works on an "overload" principle. If the system detects a high current indicating the window is not moving freerly (at any position), it will stop the motor. Your problem do can be mechanical, but I would more suspect the motor (brushes). If they are worn, the motor works intermitently. If you shake it a bit, the brushes my make a temporary contact and the window finishes its travel. Then the motor stops again.
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Old 03-30-2013, 03:55 AM   #3
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Quote:
Originally Posted by jiris248 View Post
There are no limit switches. It works on an "overload" principle. If the system detects a high current indicating the window is not moving freerly (at any position), it will stop the motor. Your problem do can be mechanical, but I would more suspect the motor (brushes). If they are worn, the motor works intermitently. If you shake it a bit, the brushes my make a temporary contact and the window finishes its travel. Then the motor stops again.
ditto....also spray some pure silicone where glass travels in tracks up and down.
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