It's either been rubbed through or come loose from the fuse box. It's just a wire going from point A to point B... unless you fried something and the wire gave out before the fuse.
_________________________
'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne