Step by step guide for idiots ( idiot, me )

OK, look, WE can't imagine what you have

1...What year model is the vehicle?

2...I assume ?? from your comments that this is NOT ? a factory like harness, but a more universal harness? yes? no?

3...What is this "piggy backed to ballast?"

4...Post brand/ model and or a clear photo of your meter, we can step you right through some of that.

5...If your points dist. is in good shape it should not be that hard to "convert back." This would be a better path for engine break in. You want to minimize possible problems when breaking in.

IF THIS IS a factory wiring harness, do you have a diagram/ service manual? If not, you can download many years, free, from MyMopar.com. You may have to accept Dodge vs Plymouth, etc. Also in the wiring section there, are aftermarket/ 3rd party diagrams that are not as well detailed or complete (accessories, etc) but CAN be easier to follow. I often use both
72 Demon with 71 318.
Original harness...at least appears to be.
The piggyback is part of the conversion I was attempting, per instructions, and admittedly, I should have left alone.
I have schematics and thought I was doing ok with it.. 20241227_105412.jpgScreenshot_20241227_111108_Photos.jpg