Blown fuse.

[bj66]

I ride an 08 tour deluxe, I keep blowing the headlight fuse. I have installed passing lights wired in according to instructions (no relay). I also have it wired for a trailer. My question is this. If i keep shorting out headlight due to driving lights, shouldnt the driving lights go out as well? They stay on, and I wasnt pulling trailer either time when it happened. Besides each trailer wire has its own fuse, unless short is in behind license plate. I am guessing pinched wire near handlebars? Just looking for ideas on where to start when it gets light out. Thanks in advance....