Boost the car, and let it run. Put a voltmeter on the battery. If its 13.5V+ the alternator is MOST likely good. If it's lower, replace the alternator.
The proper way is too measure amperage as well, however you need an inductive pickup to read amperage. You may want to bring it to a shop to get an actual AVR test done.
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Friday, June 12th, 2009 AT 4:55 PM