Being one who does not explain well, I have found these that MAY or may not help...I think they might. JUst keep in mind that all alternators don't have the hook-ups all in the same place...go only as far as you are comfortable....
When done with the above.. go here...the simplest tests are checking for magnetic field....http://www.bronek.org/sailing/zamindar/resources/Alternator-regulator%20troubleshooting.pdf
Here you will find the following and more.
Alternator /Regulator Field Tests
Test A - The alternator and regulator can be tested for function by determining if a magnetic field exists at the alternatorís pulley
shaft or rear bearing. To test:
1. With the ignition in the OFF position, place the head of a steel screwdriver near the nut on the pulley shaft or near the
rear bearing of the alternator. There should be no evidence of a magnetic field pulling the screwdriver toward the alternator.
2. Engage the ignition, without starting the engine, to activate the voltage regulator. If an oil pressure switch is used, a
jumper across the switch will activate the regulator.
3. After allowing time for the regulatorís start-up delay, place the head of a steel screwdriver near the nut on the pulley shaft
or near the rear bearing of the alternator. There should be evidence of a magnetic field pulling the screwdriver toward the
alternator. If a magnetic field is present, the voltage regulator, alternator brushes and rotor are likely to be working properly.
If the system is not charging, remove the alternator and have it inspected by a qualified alternator shop.