It wouldn't hurt to get a wiring diagram now, not only for current problems but as a guide when re-wiring it. Another forum member turned me onto this company and their diagrams are great; laminated for garage use, available in two sizes (11"x17" or 18"x24"). I got the larger size and it hs been invaluable for problems on my "68. Best of luck with your dilemmas.
https://www.classiccarwiring.com/196...iring-diagram/
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https://www.classiccarwiring.com/?gc...RoCquAQAvD_BwE