1999 Lumina power window trouble

I have 12 volt power at motor and it goes down, no trouble. If I by pass the swithes and put direct power to motor it works in both directions.?????

I have 12 volt power at motor and it goes down, no trouble. If I by pass the swithes and put direct power to motor it works in both directions.?????

Bad switch?

If you are saying, the window goes down, but not up with the switch......if you attach a test light to the motor harness, and it lights when you press the switch down, but doesn't when you press the up switch, than, yes you need a switch....

I have a similar problem on a 1995 Lumina. I have to use my hand to push the driver side window up and down while holding the switch down. I took the door panel out and cleaned all the contacts. Didn't make difference. Changed the switch too. Same thing. All other windows work.
-Is it the motor gone bad? How do I check that? Can the motor be changed. I can see three screws. I don't know if there is a fourth one which would be hard to get access to.
-Is there relay/fuse in the fuse box that I can look at.
Thanks for your info.