With 11.5 volts in the run circuit, then check the battery votlage and the ammeter reading with the key in run.
That way ypou'll know if its just a low battery, or if there is a poor connection.
Welp. The entire dash is currently out of the car including ammeter. We pulled it and fixed a few problems behind the dash and it has been easier to work on.
We currently have the the two wires that go to the ammeter vice gripped.