"Converting" a generator/regulator system from positive to negative ground is rather simple:
1. Swap the wires on the ammeter.
2. Swap the wires on the battery.
3. Swap the small wires on the coil.
4. Polarize the generator.
Everything is electromechanical. There are no solid state electronic components that will fizzle and burn if you hook them up backwards.
There are two possibilities here. Either the previous owner converted it to negative ground, or the previous owner was clueless and hooked up the battery negative ground.
Either way, you need to check the charging system out and make sure it's working. You can't just guess at what ground it is and hope it works afterward.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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