One wire alternator nonsense
Hard to do "what I can see." I don't know yet where that mess you started with ends up "to." The coil NEG does not have power "per se" it will measure some power when the ECU is powered because it feeds through from the box. The coil NEG is "switched" by breaker points, or by the wire from the ECU when used.
The 3rd party diagrams "of just the electronic ignition" don't follow particular wire codes so you'll have to be careful of color You also have to be wary because some diagrams picture the ECU connector "looking at" the ECU and some of them are pictured "looking at" the connector plug from front, so, mirror image
Simplified diagram, looking at the front of the ECU Wire at far top right labled "existing wire" is the IGN1 "run" normally dark blue. That point also brances off and feeds the alternator field (light blue) and regulator IGN power so those are not needed with your "one wire." If you had any smog devices, idle solenoid, or electric choke, those also would branch off that point
The (normally) brown IGN2 bypass wire hooks to the coil + side of the ballast, that is the bottom right terminal of the ballast
Hard to do "what I can see." I don't know yet where that mess you started with ends up "to." The coil NEG does not have power "per se" it will measure some power when the ECU is powered because it feeds through from the box. The coil NEG is "switched" by breaker points, or by the wire from the ECU when used.
The 3rd party diagrams "of just the electronic ignition" don't follow particular wire codes so you'll have to be careful of color You also have to be wary because some diagrams picture the ECU connector "looking at" the ECU and some of them are pictured "looking at" the connector plug from front, so, mirror image
Simplified diagram, looking at the front of the ECU Wire at far top right labled "existing wire" is the IGN1 "run" normally dark blue. That point also brances off and feeds the alternator field (light blue) and regulator IGN power so those are not needed with your "one wire." If you had any smog devices, idle solenoid, or electric choke, those also would branch off that point
The (normally) brown IGN2 bypass wire hooks to the coil + side of the ballast, that is the bottom right terminal of the ballast
