I have a 2000 Rancher 350 ES. I just replaced the battery a couple of months ago and all was well, but then all of a sudden when I turn the key on there is absolutely no power. As soon as I pull start it there is plenty of power, even for my winch. I checked the battery and it has plenty of juice. Also, I checked the small fuse box behind the battery and everything checked out. Any advice would be greatly appreciated.