Well the window might have come off the track. You would hear the motor running if it is still working. I know on my friends Carolla it has a little peice of plastic that held the motor in place on the window, it broke causing the window to be stuck down. She took it to Toyota for reapir. I can not remember how the Tundras windows/motors were connected in mine, I have not taken the panel off in a long time. However, you would hear the motor running when power is applied. Speaking of power check the fuses, you never know. Some of my biggest problems have been solved with a simple fuse.