Got my new DC CDI in tonight. I hooked it up to my scabbed together test wiring to see if it would spark. And it did!
So I color traced all the wires I used on my wiring diagram to show the minimum wires needed to test spark at the plug.
-red is power line... direct to cdi (no kill switches)... and also to starter for cranking engine
-greens are ground... they all lead or connect back to battery negative.
-blue is trigger signal out of magneto... it goes direct to CDI
-black is coil trigger line out of cdi... it goes direct to coil
I pulled the spark plug out of the engine and had it in the spark plug cap... just laying on the engine to ground so I could see the spark when I cranked the engine over
To get the engine to crank (w/o a button)... I just shorted my starter ground wire (also grounds the whole engine) to the battery and it cranks until I remove the wire off the battery terminal.
With this minimal wiring on my DC cdi... I was getting nice, fat, blue spark as the engine turned over.
Now... just waiting on the new wiring harness and the fun of making it fit and work.
Cheers!
