5V in run with engine stopped? That "could" be normal. The 8V cranking is not. FIRST thing to do is get a factory shop manual, access the connector for the ignition switch and see what the voltage is at the same electrical point at that connector. That will give you some idea if you have a drop through the bulkhead connector. Could be the switch itself........check voltage going TO the ignition switch
You can download the factory manual free from MyMopar, and by the way, that manual came from a few of the guys right here
