72 duster firewall wiring questions ???
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...
Check to be absolutely certain you are measuring the "key" side and not the "coil" side.
"Key" side should be same as battery, that is within a few tenths of a volt.
"Coil" side (with points closed or ECU "live") should be around 6--8V
There are only so many places you can be getting a drop..........
Before the Mad mod, .................
Big red feed through bulkhead connector..............connector at ignition switch.........switch itself.........back out bulhead connector on blue "ignition run" wire
so you need to visit all those "points" in the wiring and check them.
I've written many posts on this. If you ARE getting low voltage due to a bad connection, this LOW voltage will also cause OVER voltage when running because the regulator is sensing that low voltage and ramping up the alternator output until the "sense" point becomes 14V or so. Meanwhile the battery is way way above that
In other words, "whatever voltage drop" there is between battery and the VR, that what the VR will RAISE the charging voltage at the battery.
