Quoting Removed, click Modern View to seeSome & probably the one you bought merge the current regulation & voltage regulation functions by winding both coils on a common relay core.
Hence, the 2 vs 3. It does not care whether positive or neg ground & wiring will be same. Polarity comes from which side of battery is grounded to chassis & how you polarize the generator. Since you already had generator charging, then it is already polarized. Wiring: ARM on VR to ARM on gen. Fld on VR to Fld on gen. Gnd on VR to Gnd on gen. BATT on VR to load side of ammeter. Your done! Facing the 3 terminals, they are BATT-ARM-Fld as read left to right. Some times ARM is marked GEN.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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