Just joined because this question, Please help!
I have a MSD 6470 ignition and bought an aftermarket tach from Morris 4x4, part number 5459418. I tried to wire it but I was told I need a tach adapter, so I bought a MSD 8920 tach adapter. It says to connect it to the gray wire from the ignition to the green wire from the tach, along with all the other colors in their respective places. It still doesn't work, it lights up soi have a good ground and the ignition works so do I have a crap gray wire? Please help!!! Am I doing something wrong!? How many OHMs should the gray wire be reading? I think it's bad, if so am I screwed?
I have a 258 85 CJ I'd that matters but don't think it does.