If your 1 wire alt is a SI series Delco, you can run it one wire, or if you want a working gen light or lower rpm excite / charging, you can wire it as a 2 wire or stock 3 wire type. The 1 wire type will work equally well in all three applications.
If your old alternator is a Delco SI type and appears to be wired correctly, it may only need a field flash to get it going.
With the tractor running at about 1/2 rpm, momentarily touch a wire from the BAT stud to the regulator's #1 blade. This should get it charging if nothing else is wrong, and restore the residual field magnetism so it will excite automatically the next time you start it.
If a 1 wire alternator has not been used for many months, the residual field magnetism can fade and need the field flash to restore it.
I still like that old Delco SI series alternator. In my opinion, it is the cheapest, easiest to wire and the cheapest / easiest to repair of any alternator ever built.
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Today's Featured Article - Ford Part Number Trivia - by Forum Participants. "Replaced by" means the part was superseded. All of my part books date back to 1964 and New Holland have changed some part numbers. They usually put the old Ford part number on the package. I was suppressed when I looked up the part number of the auxiliary drive shaft because for some reason the part number went through a radical change and it lost its "Basic Part Number". Ford part numbers follow the following rules. Most part numbers are in three parts. The middle part is called the
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