Blowing voltage regulators

This field wire could have caused a short if it contacted the alternator housing even if it still had the connector cover on it.
upload_2020-1-23_17-4-32.png

The field terminal on the left must be isolated from ground.
upload_2020-1-23_17-10-13.png

It connects to a carbon brush. The brush holder is non-conductive. These are easy to take out and check.
upload_2020-1-23_17-12-40.png

upload_2020-1-23_17-13-21.png

If the ground brush is removed first (on right in above photo) there should be no continuity between the field terminal and the housing.