Hi, Hope someone can help me. I lent my 743 to a mate (first mistake). When it returned he told me he had left the ignition on for a week or so and had to jump start it. Now it will not charge over 11.5 volts. I had a bit of a poke around and found the wires running from the alternator to the cab loom and the alternator to the starter motor were burnt so replaced them. Tested the alternator with the starter cable removed and it charges at 14.5 but as soon as I hook it back up the charge drops back to 11.5. Big thanks for running this forum.