What alternator do I have?

Very first thing to do would be to test that green wire for voltage with the engine running or at least with the key on and see that the alternator field is even getting any voltage to it.
If it is, then it's quite possibly a regulator issue, and if it doesn't have any power to it you just found out why it isn't charging.

You can also momentarily jumper from the battery + to that green field wire with the engine running and the alternator should output full charging voltage.