Ok, I'm at a loss with this truck, 1987 F350 IDI auto, issue started with trying to start it. Turn key, loose all electrical power. Replaced key switch, ignition switch, and ignition module. Along with starter and battery cables. It started! Now it will randomly loose all power while running. Restarted once after jumping, now nothing. Batteries are completely dead, went to jump it and jumper cables arced out, bad. Any ideas?