Thank you for your reply. Not sure we are on the same page, but....IF I understand you correctly -- I will insert one inline diode on each of my individual rocker switch lines that go from switch Pin 3 (5-pin rocker switches) to Pin 86 on that light's relay. There are two 4-gang switch panels...
Learning as I go, I have searched forum threads and YouTube videos, but have not found a clear consensus on this type of project – using two alternate power sources to power multiple relay harnesses for respective LED spots / flood lights (small Nilight “light bars”).
While driving my camper...