I've rewired the batteries as per the black and white diagram posted. I've obtained all the correct voltages in the proper locations. The generator light is on, even with the ignition off, and the lights are not working. The generator light goes out when I disconnect the 12volt negative terminal to the starter body. I'm thinking the short is in this circuit? I'm going to clean the starter post, just trying to figure out how to get the 3rd bolt out of the starter."
I did NOT suggest that!
BOTH circuits are electrically equivalent, and the newer diagram adds the safety of small wire, fuse, or fusible link in the connection from the midpoint of the batteries to the chassis. I would NOT have changed it back to the older, individual battery cables to chassis setup.
What I DID suggest was taking some voltage readings and posting back.
Also, please measure and post the voltages with respect to the chassis at the two circuit breakers on the removable dash panel. Measure at both sides of each breaker with the key switch and light switch "ON". (These are for the lighting circuit.) One should have (-) 12 Volts on both terminals, the other should have (+) 12 Volts on both terminals. These feed battery voltage to the B1 and B2 terminals on the light switch. (Older ones MAY be marked "Bat A" and "Bat B"?)
Also, remove and isolate the (white?) wire from the A1 terminal AT THE GENERATOR and see what effect that has on the lighting of the generator "idiot light". (I'm suspecting the generator may be internally shorted and/or the points in the "cutout" section of the VR MAY be stuck closed.
Also, FWIW, a COMMON source of problems with these tractors is poor, dirty, or burned connections in the wiring harness connectors toward the back of the hood, over the RH rear of the engine.
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