I really, honestly, truly believe that going to OE wires will absolutely help troubleshoot your electrical issues. If you can't get back to OE supply wiring, it makes no sense to attempt further troubleshooting.

I'd also like to know the answer to my earlier question: Do you have access to the lighting control module? Once you have proper supply cabling, you will need to test the lighting control module and test voltages to find where your voltage drops from 12 to 6.3 volts.

But seriously, go back to OE supply wiring before attempting to go any further. We're not just saying this because we like to hear ourselves rant. Some of us have a hell of a lot of electronics know-how. We know how to troubleshoot an electrical circuit. Others around here are literally experts on Bonnevilles. If you're going to ask us for advice and we advise you, it'* seriously to your benefit if you take the advice.

If you just wanted people to agree with your ideas about testing the resistance of light bulb sockets, I think you'll need to find a different group.