Passenger power window switch failed. Now the driver side control will not work the passenger window. Why?

Whew. Doing electrical blind is a tough one. It can be several things. So, by process of elimination, we can find the problem. 1st off, the fuse probably blew, so replace it, then lets runs down the line. Remove inner door panel on passenger door Take your time finding all the fasteners before you pull hard and damage inner door trim panel. They have a way of cleverly hiding the screws and clips. Unplug window motor. Caution some inner door metal is sharp. Then with a continuity tester, check if you have power INTO each switch (key on) if you do, check if you have power going OUT when you activate switch, if not bad switch. Check fuse again that it's good. Next, assuming switch has power coming in and going out when activated, using same tester, check plug by window motor. Should have power to one of the wires when window switch is pushed (one wire for up, another wire for down) if not, a wire may be pinched somewhere, check door opening and inside door. If yes power at plug in when pushing switch, the window regulator (track and gearbox might be jammed or worn out) OR the motor went south(bad) causing fuse to blow. Make sure to test both switches. If new parts are out of budget, used parts work fine. Motor, regulator, or switches. More then likely the motor went out. Good luck. Oh yea, test your tester on the battery. Nothings worse than doing all that work only to find out your tester was bad from the start and gotta do it all over again. lol