Low charge when hot.

LivewireBlanco said

How would I check the voltage at the field terminal? Just put my multimeter positive on the blue wire and negative on the engine block?

Click to expand...

Yes.
The backside of the connector is open. If the meter has thin probes the tip can be slipped in the back to touch the metal terminal.

For the full field test, remove the connector with the green wire and install a jumper from the terminal on the alt to a good ground.