If the light switch has 4 positions L-H-D-B it was equipped with a cutout relay OEM. The cutout looks very much like a regulator, and even has a F terminal on it. (usually not hooked up to anything if the tractor was equipped with lights OEM. The true regulator if equipped will have two internal relay looking things inside it. A cutout will have only one. If the light switch is, as above, with 4 positions the first position Counter clockwise is low charge. All other positions are full charge rate. The light switch is completely separated from the charge control inside the switch, and sends electricity to the lights in D and H positions. The L and H positions provide a ground for the F terminal on the Gen. The L position grounds through a resistor, lowering the charge to about 4 amps at maybe 6.8 volts (at 3/4 throttle). the H position and D-B positions just plain ground the field, allowing it to charge as much as it can, probably should be about 7 to 7.1 volts at high engine speeds. The field windings get electricity from the commutator 3rd brush and are grounded to complete the circuit. Jim
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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