If we were still running steel back up here on back loads, I was picking it up in Columbia City at the steel mill there...
Barrman is an expert...no question...and he is dea on about the coil being THE #1 issue with starting problems...I will add this though as it is probably the #1 for overall electrical issues, make sure the ground from the batteries is making a GOOD ground to the frame...take the cable off the frame, clean the wire and and the frame where it mounts like crazy, use a toothed lockwasher to dig into the frame metal when reassembling and, I like to anyway, coat the ground wire end and the frame with a light layer of grease to help prevent any future corrosion.
Military vehicles are KNOWN for bad issues with grounds...
Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.
Pro-choice, that's a LIE, babies don't choose to die!!