j's Z28

I recently replaced the window motor on the driverside of my 98 z-28 and it stoped working after 10 or 12 times of the up and down motion. So i took it apart and rebuilt the motor reinstalled it and it worked great. Then the next day i went to roll down the passenger window and it would not go down, then i tried the drivers and it would not move either. I tried replacing the fuse in the passenger compartment fuse box with no luck. If anyone has any ideas it would help greatly.