Switched 12v source

OK PLEASE LISTEN UP!!!

THERE IS NO switched 12V source that is hot both in "run" and in cranking!!! NONE!!! NADA!!! DOES NOT EXIST

So what?? do you do?

One thing you can do is get rid of your ignition system that DOES need a ballast resistor (if you still have it) and tie the ign1 and ign2 lines together coming out of the ignition switch

IGN1: This is the ONLY source of power under the hood or coming from the ignition switch that is "hot" in the "run" position. IT IS NOT HOT DURING CRANKING!!!

This is what comes from the ign switch, through the bulkhead, and feeds the ballast, the VR IGN terminal, and the alternator field in 70/ later cars, and some smog doo dads on some. Electric choke if you have one, idle stop solenoid if equipped, etc

IGN2: This is the ONLY source of ignition power during CRANKING It originally was the brown going to the coil+ side of the ballast, and therefore bypassed the ballast during cranking and also provided ignition power during this function

So, if you use an ignition system such as MSD, or integral in the EFI, or some other ignition (HEI) which does NOT use a ballast, you can connect those two sources together.

OTHERWISE you will have to use some diodes and a relay to provide a connection without disabling the function of the two. (Steering diodes)