The whole car has gone dead. I happened twice before. Drive for a while than stop at a store. When I come out car is completely dead. I go back in the store for 15 min come back out and it starts. Last Sat it happened for a third time but this time it did not come back. Battery checked and its top notch. When I say no power I mean to anything door locks, hazard lights, any lights, Star/stop Even the OBD2 says can not connect to any computers. Any ideas my friends.