The regulator should not be affected by turning the key off while it is
running. The key should control power to the panel and to the fuel pump if
it is electric as mine is. Whether the key is on or not the alternator and
its regulator should function normally - at least on any diesel I have seen
or worked on. Now if you turn the main switch to "off" while running and the
charge current is going through it that is a different story and will
probably blow the diodes in the alternator.
running. The key should control power to the panel and to the fuel pump if
it is electric as mine is. Whether the key is on or not the alternator and
its regulator should function normally - at least on any diesel I have seen
or worked on. Now if you turn the main switch to "off" while running and the
charge current is going through it that is a different story and will
probably blow the diodes in the alternator.