When you push the window up button while the car is idling, do the revs change slightly?
If so, the window motor is trying to draw power so it's not a fuse issue.
I had this problem which i fixed last weekend. The sprocket on the electric motor somehow jammed on the teeth of the window winding mechanism that it moves along. I just pulled the window winding mechanism out and freed it up. now it works fine.
Hope it's that easy for you too.
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