Help with broken Pass power window 94musGT

My drivers side control used to work for both windows then it stopped working for the passenger window- and only the passenger side control button would work alothough it was usually only functioning on and off , now it has stopped working altogether, although my drivers window still works fine. I dont hear any noise from the passenger side like its trying to work. Im really unexperienced with mechanical problems and Im not sure where to start, I would very much appreciate any advice to be offered,
thankyou

[I had the same problem with mine, it was the switch had some corrosion on it try cleaniong the contacts on the window button on both sides it should fix it.