Please help!! 1971 340 duster having major ignition wiring headaches.

sassygrnduster said
So this is what I got
Single ballast, ignition coil and ICM
I am getting 12v read at battery
I am getting 9.8v read on hot side of ballast
I am getting 9.6V on right side of ballast
I am getting 9.8V on +side of coil with key in on position
I am getting 1V on -side of coil with key in on position
I am getting 11.2V when reading #1 socket hole on ICM wiring plug
*** When cranking the coil +side drops from 9.6V to 4.2 Volts*****

I have a wire going from the +side of the coil, spliced into my dark blue ign 1 wire (actually two blue wires that were connected to the same plug) plugged into left side of ballast.

Then I have my black and yellow wire from my ICM plug to my coil -side

Also I have my blue and yellow wire from my ICM spliced into my brown Ign 2 wire (actually 2 brown wires, they were already connected to the plug from original harness) plugged into the right side of my ballast.

Please help, any and all suggestions welcome.

The 4.2 when cranking means the starting/ ballast bypass IGN2 circuit is not working or wired wrong

"

I have a wire going from the +side of the coil, spliced into my dark blue ign 1 wire"

This sounds wrong. The blue is normally the IGN1 "run" coming from the key into the engine bay. That (if the one) feeds VR IGN terminal, alternator field, the key side of the ballast (not the coil directly)

Somehow I missed: What is the reason for this rewiring? Did the car have another system and you added this? Or is this some trial and error to get it working, or what?