Wiring issue with voltage regulator

The ballast has one end blue wire originally. That is switched ignition run or IGN1. The other end has a brown and whatever color went to the coil+ That brown is IGN2. You must jumper IGN1 and IGN2 together and use both of them for the "run" feed, and to the VR and field. That junction is where I was talking about "think about installing a relay. Use the junction of the blue/ brown to trigger a relay. Ground the coil, or feed it through an unobtrusive switch to ground for a simple anit-theft.

Feed the relay power from a fuse/ breaker off the big stud on the starter relay. Take the load end and connec that to all your underhood loads,......the MSD "small red", the VR blue, the field blue, and so on.

THE REASON you must connect the brown/ blue is that IGN1 "run" GOES DEAD during cranking. Originally the coil was supplied power by the brown, which is hot "in start" This is NOT the same as the yellow start wire, the two are separate switch contacts.