imported post
Make sure that your taillights are working. If they are not, you probably have the dreaded #3 relay failure. When my #3 relay conked out, I only noticed because my fuel gauge and temp gauge weren't working. If that is what it is, a quick fix is the Pilot PL-RY1 relay available at Autozone or other auto parts places. A heads up though, in Autozone it will not be with the regular electrical section, it will be with the aftermarket driving lights.
If it is the fuse, it will be #8 and that also controls taillights. My guess is it will either be that fuse or the relay. Nothing to panic about either way, it's a quick fix.
Sorry for another edit, I also noticed that it happened when the fuse blew to your auxiliary power supply. If it was me, I would do a quick rewire and run a new wire with a fuse directly from the battery. It doesn't have to be pretty, and it wouldn't take more than a couple minutes and will save you grief while on the road. You shouldn't have to worry about the ground but the positive side would then be removed from that circuit. The only thing you would have to pay atention to is that it wil be live all the time but that should be no big deal as long as you don't leave any big draw item plugged in while the bike is off. You can worry about rewiring it the way you want later.