We just had this problem. We were coming from the beach and the cruise control turned off when we signaled. A few miles later the door locks clicked and just as we pulled into the driveway the car completely shut off. It wouldn't turn on at all, completely dead, including the door locks. I unloaded the vehicle and decided to try to jump it, but when I got into the truck the dash lights came on and the vehicle started up as if nothing was wrong. I took it to have the alternator and battery checked and everything was fine.