power windows stopped working - '01 Blazer

I lost power to all windows at once. The relay is brand new. On occasion, I can move a window 2-3 inches before the power stops, then have to wait a while before I can repeat that. Most of the time, the windows will not move at all. All connections appear to be okay in the control box in the door. Any other things I should look at before I take it to a dealer?

you need my help , check all fuzes in car and under the hood also. then check for 12volt + on the master window switch the wire should be pink and large (not total for sure on that) , and if their is no power to the switch check the door jam rubber boot for a broken main wire might be any color , tell me what you find
. -Advanced Mobile power window repair-