Jonpiero, Another member may have better advice, but I had a similar problem, where my window would go down, but not up. I had to purchase a new switch cluster. I could only get the window up by bypassing the switch. The switch is fairly easy to replace, once you lift off the door panel. If you try a new switch, try to get your part supplier to allow a return, should it turn out to be something else. (the worst they can say is... no)

PS... I think I read in my manual that the negative terminal should be removed for a minimum of 30 seconds, to protect the electronics, I assume. Leave it disconnected a bit longer to be safe.