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Got the batterys switched out etc, a;; good on that front. Started motor, 14.2v on 12v terminal, 36v+ on 24v, I shut it down real fast with no apparent damage. Would this alternator bolt onto the 3116? C.E. Niehoff & Co Generator 76761-N1603-2 28 VDC 450 Amp Voltage Regulator N3211

Ok Gents, I am seeing some light thanks to you. I did the tests on the alternator, with the VR unplugged we lost charge V on 12 and 24. with It plugged back in, charge was 14.2 and 28.4. As soon as the service drive(lights) were turned on, the 28.4 went up to 31.2, and this would change with...

Thanks Gents, I had charged them, but will seperate, charge and load test then re arrange. The help is appreciated.

thanks a ton Ronmar, that’s a lot of good info that can cave my head in. Will dive into this in the next few days. I will let you guys know what I find and I do appreciate the feedback.

My regulator does not have the lights unfortunately

It has the PPD, but it was cooked so I joined the wires. 12-12 and 24-24. the truck is 1996

When the engine is running I’m seeing 32v on the 24v post and 14.2v on the 12v on the relay panel, the 14.2v appears good, but the 32v is high. I took a pic of the readings on the regulator and alternator when running, excuse the wobbly text. basically 24.2v on the left post of regulator, 32v on...