some times a fuse may not look blown but it is. find 12 volt power tester (kind of loops like a screw driver with an alagator clip and a clear handel with a light inside)go to your battery and hook up the fuse up to the alagator clip and touch the fuse to the + or the - on the batery termenal. then touch the pointed end of the tester to the opposite terminal
light comes on your fuse is still good
else
of course the fuse is bad and change the fuse