Not charging with headlights on

I found these two tests on the forum and did them. I do have the same 12v on both tests as the battery:

"To troubleshoot, get a meter or lamp, first clamp the meter/ lamp to ground (battery negative) and probe the big stud on the alternator. Make sure it's hot, has 12V same as battery.

Next, turn on key to "run", unhook GREEN field wire from alternator, and probe the EXPOSED TERMINAL on the alternator. It should be 12V same as battery"