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The window regulator is gear-driven. The arm that raises and lowers the window has a long curved rack, driven by a gear on the motor. Most likely, if you can hear the motor running, then the gear on the motor is broken, or the gears are stripped. I've had both problems. You'll need to pull the window regulator to disassemble and pull motor to find out for sure which one it is. Either way, it sounds like you'll be changing the motor.

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โˆ™ 2007-12-24 14:13:15
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Q: 1990 Ford F150-Driver side windor will not go down or up but you hear the motor trying to work What is the problem?
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