Help, car won't start. I drove it a short distance three days ago to my destination. When I came outside to start the car, it was cranking over trying to start at first, then it quit. Had to end up pushing it home. Had battery, starter, and alternator checked and all tested good. Replaced negative battery cable. Voltage continuity throughout charging system. Unable to check amps because car won't turn over. Any ideas, anyone? It's a 1983 Olds Custom Cruiser automatic with a 5.0 L V8 engine.