Thanks for the feedback. Being its a diesel instead of a gas engine the wiring methods used to provide initial excitation voltage to the alternators small side 1/R terminal can vary a lot and still work, but its not rocket science and perhaps ? its wired to work already ONCE YOU SWAP THE TERMINALS on that white plastic connector ? I have seen oil pressure switches or various other switches and methods used on diesels to send excitation voltage down to 1/R on the alternators side. Can your white plastic connector be changed side to side so wiring is reversed and still plug in or not????? I've seen plastic tabs that prevent reversal while I've also seen some (maybe jury rigged??) that can be reversed. Most guys just jump the small 2/F terminal to the big main rear output on the alternator and it works fine. As a used tractor dealer I've seen hundreds working okay wired that way while the actual battery voltage on the terminal could be slightly different and wiring instead to the battery could be better. Either way will work.
I didn't take time to go look at a 10SI Alternator to see FOR SURE what side is 1/R and what side is 2/F and NOTE my and others explanations are assuming its wired wrong YOU HAVE TO LOOK AT YOUR ALTERNATOR TO MAKE SURE and if its NOT as were thinking we all have to go back to the drawing board lol ITS THE 2/F TERMINAL THAT SENSES VOLTAGE AND IS WIRED TO THE BIG MAIN REAR OUTPUT STUD OR BATTERY
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