1993 cavalier

My automatic door locks, horn & interior lights have suddenly stopped functioning. Where are the fuses located (if that is the problem) or what else could it be? also on my rear window defogger only the top 3 and bottom 2 wires seem to work. Any ideas?
Thanks

I have a 94 and mine is in the glove box left hand side as in defog they sell a kit that overlaps the broken wires on the window not too expen

The fuse box is located an the left drivers side (just above the hood release lever). One of my fuses went (15 Amp instr.) I didn't realize that just one fuse could caose so many things to fail. Thanks to all who replied.