1973 Scamp won't start in start only in run. With a Twist....

I'm out of ideas without being there.
Who me? I've been nothing but respectful and grateful for the help. What are you referencing?

We are good LOL. But by "remote control" I'm running out of ideas. One suggestion
...................."rig" an old tail lamp for a test light..............

"Revisit" your voltage tests at coil+, in run and in "start" with the meter AND WITH the tail light test lamp hooked up, which will load the circuit some. Your coil + "run" voltage will be lower of course, more drop through the ballast

Likely the "usual suspects" here in no order is:

The ignition switch itself
The switch connector
The bulkhead connector
The ECU connector

That is assuming that lack of power/ voltage to the circuit is the problem