2000 S10 Window Problem.

[Eggszecutor]

2000 S10 ZR2 power windows will not go up/down. Neither the driver side nor the passenger side will move. When I press down on the window switch it clicks about once every 0.5 seconds. For awhile, the problem was sporadic. Some days it worked, some days it didn't. Some days the passenger side would work and the drivers side wouldn't and visa versa. Now it appears to be permanent. I don't think the problem is electrical since I hear "clicking" when I press the windows switch.