Late 90s Windstar Vent Window Stuck

A friend has a late 90s Windstar and one of the back power vent windows is stuck open. How can I close it manually.
Steve

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Tap on the glass were the bolt is while someone else pushes the button.
Johan

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That's assuming the motor still works, it doesn't.

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Duh........
The motor is stuck and by tapping on the glass the motor , sometimes, comes back to life..
Also works on front window motors, rear wiper motors etc...
If you dont believe me, dont try it

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