Having charging issues

Next step...............

Clip your test lamp to the great bit output stud on the alternator. BE CAREFUL you do not short this to ground.

Make sure the lamp works by grounding "the other end" The lamp should light

Now, disconnect the alternator field wire. With one end of the test lamp hooked to the alternator stud, probe the other end to the alternator field terminal.

The lamp should light.

If not time to pull the alternator and check the brushes and field.