Here is something crazy. On my 87 sunbird SE convt. the power windows quit working. I found out that when I wiggled the tube where the wires go into the drivers door they worked again. (even tho now I cant get it to do it again) I took the drivers door panel off and checked the red (more like a pink) wire, and it is getting power. It also seems that the wires coming off the 4 switches are transmitting power as well. What sence does that make? I could see if it was just one window motor, but why isnt any of them working???
Maybe your switch is going bad.
if you can take the switch apart and clean the contacts....the might help out.....try to jump the motor to make sure its still good, you could use the battery from a cordless drill
or you could check your wring harness for a short. as that osunds most llke your poblem. if you wiglle the wire harness it works. so check for a short in that part of th harness.
Is there anywhere to buy a new switch?