72 duster firewall wiring questions ???

Also planning to do the ammeter bypass wiring. Prefer to avoid said issues down the road if possible...

Still a little curious why I am going getting 7-8 volts on my blue wire that goes to the ballast resistor on the firewall when the key is in the run position... Any ideas other than tracking the wiring from the battery - through the starter relay - firewall connection - ignition switch - to the ballast resistor...? Car was running and driving before like this with the standard Mopar points ignition, just trying to find a good 12 volt source for the new HEI distributor before she shows up.


http://www.madelectrical.com/electricaltech/amp-gauges2.shtml