Thanks for your reply. I just have one wire, its green/black, from the ignition to the pos (+) terminal of the coil. And that agrees with what I see on the wire diagram, ( I think I copied that from a papajam post a few months ago).
The neg (-) terminal wire runs to the distributor.
I was wondering what was up because the blue coil I just installed was getting much hotter than the old coil (with ballast) did, and when I put my multimeter on the new blue coil, it was not reading RPM correctly, but the old coil with ballast did read RPM correctly.
I wanted to read RPM correctly on multimeter while turning the decel in/out to get the best rich/lean mixture.
I just put the old coil back.
Series 1 Euro GTV - a long time ago when I lived in Italy, US Navy 1985-86.
Series 2 USA 2000 Spider Veloce - current. - - - AROCSC - - -