Cranks but won't start. Unplug ground at field spade on Alternator and it starts?

That proves the IGN 2 is not providing battery voltage to the coil plus during cranking.

Why is the big question.
If I unground neutral safety switch so starter won't run, disconnect Ignition 1 from ballast resistor, then put key in start position I measure 12.3 volts vs the battery 12.5 volts. Ballast is .8 ohms and I have another that is 1.2 ohms same behavior with both ballast resistors.