key on not running draw

I think "we" are on the wrong track here. I think you have a defective terminal/ device in the path to the ballast resistor/ ignition. Generally, the path is battery.....starter relay "BIG STUD.".............FUSE LINK........through the BULKHEAD CONNECTOR.......(on RED ammeter wire).........through the AMMETER.......out on BLACK to the under dash WELDED SPLICE..........branch off to IGNITION SWITCH connector, through the switch, and out on DARK BLUE.........out through the BULKHEAD CONNECTOR....into the engine bay and junction at the ballast resistor, branch off to feed the VR and the alternator field.

I think you have a bad connection somewhere in that path. Do some voltage checks with ignition on. Start with the large feed into the ignition switch, and the "ignition run" coming out, and check both sides of that connector. If that blue (output) seems OK concentrate on the bulkhead connector If the feed TO the switch is low, also concentrate on the bulkhead. Check the voltage on the fuse link going into the pass compartment.