I have a lightly used 98 Grizzly 600 that shut down on me this weekend. It started up fine as usual. As I was moving the machine and shifting from reverse to forward, I heard a "click" and the unit shutdown. Now I have no electrical power anywhere: no ignition, no lights, just dead.... I've checked the main fuses by the battery and they are okay. Can a starter relay switch failer kill all power? Battery is okay. Any ideas?