I have a 1994 Jeep Grand Cherokee Laredo with the 5.7 V8. The other day, I turned off the car, locked the doors, and went inside the store. I came outside, unlocked the car, turned it on, and immediately tried rolling down the window. Nothing happened. Okay, so I tried the other windows. Nothing. I tried the switches on the other doors, still nothing. The power locks and lock switches still work. I checked the fuse with a multimeter and it does carry current. I pulled the switch on the driver's door and tested it, it appears to work fine (with a multimeter). I checked all the fuses under the hood, and they're all good. What could the problem be?