Alternator/regulator upgrade

Mattax and 67Dart273 thank you for describing the potential charging fault locations.
I will take another look tomorrow; I'll strip back the harness branch to the alternator and try and see what was done in the stock reg delete mod. I checked the bulkhead connector a few months back and in was in good shape; I'll check it again to ensure that it's still good (not caused by my intervention).