I have a 2001 Virage that just shut down on the water...The relay tripped. I checked all connections and grounds and put in a new battery...It ssarted again after a days wait...I put in a new battery and after an hour on the water the same thing...Shuts down no electrical..everything off. When reconnect the new battery I get a spark when trying to connect and the relay trips again...Nothing lights up. What would cause an immediate short. Would really appreciate any tips.