You have not mentioned what voltage you have at the S/G and at the battery, not running and running wide open.I’ve ohmed most of the wires and they have all checked out but I’ll keep looking thank you
I’m more of mechanics of the engine but not knowing electric do I have to re-polarize the new s/g when I get installed ?
Load testing a battery requires a load tester. I'm guessing you don't have one, so an auto parts store should be able to test it for you.Voltage across the battery engine off 12.5
Voltage across the battery while running high or low rpms 12.3 I’m not sure how to load test the battery
Do I have to disconnect the field line on the voltage regulator before grounding the field terminal on the s/gLoad testing a battery requires a load tester. I'm guessing you don't have one, so an auto parts store should be able to test it for you.
With the tractor running, temporarily ground the F terminal on the starter/generator. This will bypass the regulator and force full output. If that doesn't change anything, the starter/generator is bad. If it pegs the ammeter on the charge side, there is a problem with either the voltage regulator or the wiring connected to it.