I rebuilt an 856 last winter including complete new wiring harness and I replaced the external regulator Delco 10DN alternator with an internal regulator Delco 10SI.
To adapt the internal regulator alternator to work with the IH charge light and stock wiring harness, Down under the dash, where the external regulator plug is mounted, fabricate a jumper wire to connect the outermost terminals at each end of the regulator plug. All that takes is about 4-5 inches of 14 ga wire and two flat blade male crimp on terminals.
The alternator charge light will now ground to one of the two wires in the little square alt plug up at the original alternator mount. Buy an auto parts regulator repair plug for an internal regulated Delco alternator (10SI).
Put an eylet terminal large enough to fit on the big "BAT" stud on the alternator rear, on the #2 alternator repair plug wire (usually a heavy red wire).
Add a male spade terminal terminal to the #1 wire(usually a small white wire) on the alternator repair plug at the alternator. Plug this male spade terminal into the correct. terminal in the original alternator plug in the new wiring harness.
It's been long enough that I don't remember which of the two terminal in the new wiring harness needs to have the white #1 alt wire plugged in, but it will make the alt light come on when the ignition switch is on when you get the right one.
Tape up the harness where the original and the new adapter plug go together, and your good to go with an internal regulated alternator with a stock working charge light, all without cutting up your new stock wiring harness .:-)
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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