Are you ready for a real weird one? Random NO spark from a MP electronic ignition system despite numerous parts swapped around...

[MWbirdLOVER70]

I soldered in the only two wires that needed it. The harness already had the two wire plug to the distributor. The green wire is not needed for the two spade ballast resistor. That leaves a black with yellow tracer to the coil negative and the blue wire to the ignition switch.

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I clocked the ECM to put the plug closer to the ballast resistor and routed the wires underneath for a cleaner look.

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It is still a rat’s nest but I wanted to test fire again before I wrap it up with tape.

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Then, I reached inside and….spin-spin-spin!
Son of a bitch….
I left the coil wire off! It starts up like it should. I’ll wrap it up tomorrow!

Two things here. 1) one of my wires is wired to the left side of the ballast and 2) in my quest for an original looking car I’ve never used the supplied MP ballast from the kit I bought in 1986 but rather the original ballast or type used on my 70 and other pre 70 models. Just my 2 cents

 

[MWbirdLOVER70]

I’ll check with ACE hardware fir a screw that will work.
This plug sure fits tight.

I’ve only ever had the screw in those harnesses

 

[Kern Dog]

One of my wires is wired to the left side of the ballast.

I don't know that it makes a difference. If I am wrong, I'm open to learning.