Stereo fuse blowing repeatedly?

[quailrunner]

The inline fuse for my (I believe) stock stereo in the 2006 185 sport was dead when I bought the boat (used) last spring. Thought nothing of it, and replaced it; worked for the summer. Boat is in for the season, and the fuse is blown again. Is this something that people see happening w. winterizing, or should I start looking for a short somewhere? Thanks!

 

[Redhook98]

Start looking for a short somewhere. This is not normal under any condition.

 

[quailrunner]

Don't want to hear that, but pretty much expected it - anyone with hints as to where to look? The wiring isn't super complicated, but some of it is well hidden.