The whole electrical just went dead all of a sudden. Nothing works. Battery and alternator appear to be OK. Jump start works fine, but after turning the car off, all is OK until you try to start it again and everything electrical dies. Doesn't make any sense. Can't even lock the doors. The main fuse 50 amp looks OK. It seems like something is shorting the whole system out when you try to start the car, unless you are jumping it from another battery. Any clues?