1994 Mustang

Its right next to the battery under the little black cover. Unstap it and there you'll see the fuses. Also there is one right next to your left leg under the dash when your sitting in the drivers seat.
 
I need to replace the fuse that goes to one of my cig lighters. Not like I ever use it but hepfull when plugging in some other type of accessory. Cell phone charger, mini air compressor...exc exc