For both halves of the electric system to work the little ground wire from the midpoint of the batteries to the chassis has to be intact and actually grounded to the chassis (as-original the little ground wire goes to the battery box, and rust or point can isolate the battery box from the rest of the chassis).
If that checks out, move on to the combination switch, the "BATT A" terminal on the switch should read -12 Volts (nominal) with respect to a good chassis ground, and the "BATT B" terminal on the switch should read +12 Volts (nominal) with respect to a good chassis ground.
Checking BETWEEN the "BATT A" and "BATT B" terminals on the switch should yield 24 Volts (nominal).
The little ground wire at the batteries is marked as "F" in the diagram.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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