Crusing down the HWY @ 90mph and the engine stops running. All electrical still on. I pulled over and shut the car down. Tried to re-start. Turn the ignition to ON.. all electrical worked, radio,etc... voltage indicator normal. Turned the ignition to START.. alll electrical shut down... voltage indicator level "DEAD". Checked battery cables and connections.. everything nice, clean, no corrosion and tight. Any thoughts?

check your spark plug connections.....