Over charging

Make SURE you are not leading yourself down the wrong path.

Double check with a current drawing test LAMP instead of a voltmeter. If both the blue and green have power the alternator cannot charge. So I'm questioning your test results

Use a lamp (not led) AND meter to double check:

1...Disconnect green field wire at alternator. Check from the disconnected alternator terminal to ground. Should be dead with key off, should have battery power with key "in run."

2...Disconnect VR connector. Probe blue wire, should show same as 1. above

3..If test in 1 is OK, leave green disconnected, fashion a jumper clip wire from the disconnected alternator field to ground, and briefly operate engine. It should charge hard, more rpm, more charge. Now DISconnect your jumper and charging should stop. Turn key "off" and engine should stop. VERIFY that the blue the alternator is dead. IF NOT you have a harness short/ melt problem.