What might be wrong if all the power windows just stop working in your 93 Nissan Altima but there are no signs of any bad fuses?
Try replacing the power window amplifiers. It is a black box
about 2"x3". There is one in each door except the front driver's
side door. They are not cheap from the dealer so try getting one
from a local junkyard.Or it could possibly be the main control
switch in the drivers side door. It is the box with controls for
all the windows on.Mine was broken after I dropped the door panel
while putting in speakers, it has a printed circuit board inside
and none of the windows would work until I replaced it.It was $98
from the dealer but easy to put in myself Did you look at the
link-fuses under the hood?? there are just inches of ther battery,,
betwen battery and driver side fender,,, See ya!