I know this may sound too obvious and dumb, but if you get good power to the motors and the windows dont come down, you might apply some light pressure downward on the window just to make sure it isnt stuck to the seal at the top. You mentioned that its sat for 5yrs......so just a thought. Ive had this happen before with a weak motor and a window that was dang near glued to the seal, the motor just didnt have enough power to break it loose and bring it down.
Good luck