In Reply to: Electrical harness, ignition problems posted by Marty on May 22, 2018 at 16:16:26:
Depressing the starter button and not even a click would suggest a dead battery and/or bad wiring. The fact that Bruce(VA) stated about wire colors and electrons must be heeded. Unless you get one of the new, exact-as-original wiring harnesses made with the original cloth covered and color codes, you cannot go by any new type wiring harness. Even so, continuity must be tested with a multi-meter device to verify -don't guess. One wrong connection and you may let the smoke out of something. I'd start with battery. Ignore whatever colors the wires are -verify logically. You say the battery shifted and started arcing against the frame. If the terminals on the battery are not on the top of the unit, you don't have the right battery -avoid side posts style. By jump starting your tractor you are only running off the supply side/donor battery, not the tractor battery, and, could possibly mean your tractor battery is dead Get it checked at a starter/alternator shop or auto parts store. Once battery issue is resolved, get it fastened down in the battery tray so it doesn't move. Many fellas take the battery hold downs off and that is a mistake IMHO. K-LaRues' wiring diagram is correct, but there is a 3-wire alternator diagram to help. Finally, avoid just replacing parts with new until root cause problem solving determines if defective. The 1N5408 diode in-line as shown is a common part, but Radio Shack is all but defunct, so any electronic parts supply house will carry it. Diodes are polarized, meaning one end is positive and the other end is negative and it matters which way it is connected in the circuit.