Update: The blue wire to alternator field tab, the screw was loose. The green wire to the field tab, the screw was tight. The blue wire insulation was melted for about 16 inches from bulkhead connector to the NUMBER ONE SPLICE. The rest of the blue wires and harness wires were good. The blue was was only melted from splice to the bulkhead connector(16"). Why, if the blue wire field screw was loose, I would think the wire would melt from the loose screw and away from it? It melted after the splice to the bulkhead connector?