going one wire alternator.

[prg machine]

By reading the Madelectric articles I think I have it figured out. The ammeters in our trucks read across a shunt. The main power does not flow through the ammeter like the old conventional wiring of an ammeter. The shunt apparently has something to do with the long wire running across the front of the truck with the little fuses in it.
The articles reccomend the #2 wire from the alternator going back to the solenoid hot lug for voltage sensing. Some of the articles I see on this site jump it back to the HOT lug on the alternator. The alternator only "sees" the 14 volts coming out of the alternator and it is not getting the correct value at the circuit which is probabvly 2 volts less.