Hi guys the 20 amp #4 fuse on my 2002 outback keeps blowing. This fuse controls the fan motors, cigarette lighters, power mirrors and make up mirror lights, and either the seat heaters and/or their switches. I bought the car two months ago with it blown, and have replaced it 5-6 times since. Sometimes it would go a day without blowing, other times weeks. It blew two days ago, then last night and when I put a new fuse in last night it blew instantly. I'm thinking it's a short somewhere in the system but don't know how to look, or too much experience with electric systems. Any help would be appreciated folks.