Went out to start the truck and upon turning the key no idiot lights no power to anything. Since the battery is 3 years old I figured I would start there. Pulled the cables off and cleaned up the connections using the proper tool. Still nothing at the switch. Hooked up the battery charger and put it on boost. Still nothing at the key. Disconnected the battery charger. Left the key on and jumped the terminals at the solenoid, cranked right over and started. Turned on the headlights and the engine immediately died. Original style Alternator. Volt meter shows no voltage at the big terminal (engine not running and key off). Next?