Thanks for the heads up Owen. I guess I should not absolutly trust an internet download wiring diagram , especially a 66 series diagram, and assume it is correct for a 56 series. The one I had handy(66 series diagram download), clearly shows the #3 wire connected to the battery at the starter.
This and your post had me really confused, so I headed out to the shed to stick a 12V test light in my 856 regulator socket to see if that #3 terminal is hot all the time or is switched. I found your diagram correct, #3 has switched power, so It would not discharge the battery through the 10SI field circuit when parked if all 4 regulator wires were connected together.
One question though,looking at your top diagram from IH. My jumper wire conversion only connects the F wire to the #4 gen light wire so the F wire can excite the field in the 10SI and make the factory charge light work.
Would not connecting all 4 regulator plug wires in effect connect #3 to#4 and disable the charge light, in effect wiring switched power around the gen light ??
Not trying to play know it all or start a fight, just trying to get the guy correct info to do his 10DN to 10SI conversion without cutting up a new wiring harness. Thanks for correcting me on #3 having switched power on a 56 series IH.
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