Rebuilt Generator installed: Higher the RPM the more discharge

[bogiediver]

I ain't no expert - but that really sounds like the same issue I had and it was simply the ammeter wired backwards... the behavior you are describing would be correct if it were to the 'charge' side... (i.e. idle @ +2; give it RPM and jumps to +10). I'll bet at idle - if you turn on the lights - it goes over to showing +5 or so, as it's wired now...

I know there are a couple of wiring diagrams out there that show the wires on the ammeter at what appears to be opposite recommendations.

But, the diagrams are looking at the ammeter from different sides...

The color diagram I posted is looking at the ammeter from the passenger compartment... so the yellow wire goes to the drivers side post and the yellow/black goes to the passenger side post (when the ammeter is mounted) - at least I'm reasonably sure that's correct - anyone else confirm?.

Since it appears your wiring is not 'stock' (per the photo of the yellow wire) - be sure you trace it all the way to and thru the terminal box to make sure nothing crosses over there.

Once you get the reading issue straighted out - you may also have to set the 'third brush' in the generator to the correct output... more on that later after the readings get right...