one wire Alternator and voltage regulator question

like_A_pike said
View attachment 1715698911

not the greatest or totally controlled experiment and I added some tests on the (+) side of the coil.
Yeah Mattax, the battery lost some ground after our crummy weather spell last week and did require some charging to get it to 12.5. It got up to 12.7 after running for 15 minutes or so this morning. I think that I am using the word ammeter and the gauge in the dash as the same thing erroneously. thanks for that...

The readings in the left column tell the story. Does it ever go above 14-14.5 max? if not "you are good." It surely is a "one wire."

NOW what do you have for a charging path to the battery? You do NOT want to depend on factory wiring for a "one wire" it needs to be up--gauged. Plus if the old ammeter wiring is in place (bulkhead connector) that can be a big problem