Converted 9N Ammeter

(quoted from post at 12:44:39 07/22/19) Hey gang . . . please some one have a silver bullet for my issue. I have a 9N that has been converted to 12V. It runs like a top but I noticed the other day my battery dragging and coincidentally ammeter not showing a charge. I replaced alternator with a self exciting, internally regulated alternator. I have been able to get it to put out a charge just fine. However, nothing at ammeter. Actually to get the charge back to system so tractor will run without battery, I had to "jump" the ammeter. So I figured ammeter is the culpirit so I replaced it with one from autozone---same issue. For the meantime I just spliced the two leads that should go to ammeter together---runs great and charges batter but irks me.

What am I missing?

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(quoted from post at 13:10:31 07/22/19) it's basically hot wire from the battery/ignition on one post and supposedly hot wire coming from alternator . . .

Is there potentially something with newer gauge that needs to be set up different?

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(quoted from post at 13:52:58 07/22/19)
that's making some sense---at some point when tinkering with it I would get a tiny bit of movement on the needle. However, to get the alternator going I still had to "jump" the gauge to excite it.

It appears the way it's wired will work somewhat, however
-I'm not getting any juice from the battery down to the alternator to excite it
-once alternator is going, the gauge isn't letting juice back through to charge and/or register on gauge.

Now my brain is spinning wonder if the gauge ever even worked :?

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