The ballast resistor has two feeds from the ignition switch, one from the run position and one from the start position for feeding the coil + side 12.+ V when the starter is engaged. Once you turn the ignition switch in the run position you should see 12.+ volts on one side of the ballast resistor and around 6.0 to 8.0 volts on the other side going to the + side of the coil. scope
You should also see 12.+ V on the + side of the coil when you have the ignition switch in the start position also scope
If you have both of those voltage I would think the Pertronix module is the problem work shruggy
Do you have a trouble shooting procedure for the Pertronix unit?

Last edited by Cab_Burge; 11/16/19 09:57 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)