Overcharging Help needed (74 scamp)

WHY THIS HAPPENS

When there is voltage drop either in the hot harness or the ground, the VR is NOT seeing the "same as" battery voltage. When the voltage reg. is warmed up and is properly regulating to 14V nominal AT IT's TERMINALS, IE it's ground and it's IGN terminal, these voltages ARE NOT what the battery is seeing because of the harness voltage drop. The load on the harness that is the igntion system, the VR/ field circuit and whatever else is on the "run" line PULLS DOWN the voltage as it drops through the harness, so the VR "ramps" the voltage back up..........and at the "other end" this ramped up voltage is what the battery "sees."

A DIFFERENT WAY to check this and to understand this is start and warm the engine and get the battery "normalized" after starting with the thing on fast idle. Measure battery voltage to engine block. "Let's say" it's 15.5V TOO HIGH!!!

Now measure the "key side" of the ballast resistor to engine block. 14V!!!! WTF!!! NORMAL!!!! Caused by voltage drop!!! The VR is JUST FINE!!! It is regulating at 14V!!! But to get "that 14V to that point in the harness" so to speak, it has to travel from the battery, through the harness--and through the voltage drop-- to the VR connection at the ballast. And now it has DROPPED because of the resistance in the harness

WHAT IS THIS resistance???

Usually, bad, corroded terminals ANYWHERE in the path. From starter relay, through fuse link, the BIG RED wire going through the bulkhead connector..........goes to ammeter, might be a small amount there at the ammeter too----goes to the WELDED SPLICE in the black ammeter wire, branches off to the IGNITION SWTICH CONNECTOR can be drop right here at the connector.........AND THROUGH THE SWITCH ........and there is likely some drop there in the switch contacts, then BACK OUT THROUGH THE SWITCH CONNECTOR on the "dark blue" IGN1 "run" wire so more drop through the connector terminals.........now BACK OUT THROUGH THE BULKHEAD CONNECTOR on the dark blue "run" so even more drop through the bulkhead connector and finally to one end of the ballast and near there somewhere / branches off to the VR and can even be some drop at the VR IGN terminal