The old beast of a bass was not outputting signal from one pickup. In it’s old age corrosion had caused some intermittent connections through the switch and pots. The pickup circuit itself measured correctly so it was a fairly simple clean and re-solder connections throughout. All pots and the switch get a good spray with De-Oxit and it’s good to go. These Ricky’s are massive sounding basses and it’s a good feeling to help nurse these classics back to health.