Anyone know what year AC switched to negative ground. Wiring diagrams for the early D15 showed 12 volt positive. D10/D12 manuals show 6 volt positive but I know that is wrong for the later ones (the three 61s I have 15, 17, and 12 appear to have been factory 12-volt positive ground).
I went to the warehouse to get some Electronic Ignitions for both the D14 and Kim's D10 and hadn't thought much about it until I remembered that hers is positive ground and that the EIs had to be matched to positive or negative. It's a 1964. In looking through my manuals, all the wiring diagrams through D-17 SIV show positive ground. I don't have a D-19 wiring diagram so couldn't look that up, but both D-21 manuals show negative ground.
My guess is the switch was made around 1965? Anyone know?
I went to the warehouse to get some Electronic Ignitions for both the D14 and Kim's D10 and hadn't thought much about it until I remembered that hers is positive ground and that the EIs had to be matched to positive or negative. It's a 1964. In looking through my manuals, all the wiring diagrams through D-17 SIV show positive ground. I don't have a D-19 wiring diagram so couldn't look that up, but both D-21 manuals show negative ground.
My guess is the switch was made around 1965? Anyone know?