More ignition issues on the dart

Spinning the dizzy by hand gives me .5v AC, which I traced all the way back to the pigtail that plugs into the IGN box. Spinning it with the starter, however, only gives me .1v AC. Grounding the dizzy wire sparks it but the dizzy pickup doesn’t. Either .1v isn’t enough, or the pigtail is screwed up. All my connectors in the pigtail are nice clean brass except one of the dizzy wires. Tried cleaning with a cotton swab to no avail. I suppose I could try another pigtail, I have extra harnesses