This site is a great resource for those who do moat of the work on their own cars, it has a great procedure on how to test if the alternator is bad or not working correctly.
This PDF was made from a pamphlet produce by Delco Remy to service their Voltage regulators. information such as this is quit hard to come by nowadays since everything is electronic instead of mechanical.
this site is a great resource for people who are interested in electronics or some one who needs to fix something and thinks that a bridge rectifier is the culpret
This is a great forum with a wealth on knowledge about anything hot roding, and mechanical skills. it also has really neat build threads from different members.