alternator wont charge

If the test above shows a charge, reconnect field wire, move up the regulator. Disconnect the connector and devise a method of jumpering across the VR harness connector. Two small machine screwss will work. Now move to the alternator, and disconnect the BLUE field wire, and ground that field terminal. Again see if it charges

If it charged earlier but not now, you have a wiring problem in the VR field circuit. If it does charge.......

Make CERTAIN the VR is grounded. Scrape around the mounting holes and mount tight with star lock washers. "Work" the VR connector in/ out several times, and examine it closely for looseness/ corrosion. If no charge, replace the VR