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When the alternator is confirmed to be good and not charging, we ned to look at :
1. Alternator belt tension. Do you hav any screeching noise when the engine is running? If there are, check the belt tension AND the crank pulley harmnoc balancer if equipped. Quite often when the harminoc balancer fails, it would be slipping causing the abnormal noise and insufficient charging.
2. Did you test the voltage at the alternator main terminal when engine is running and what is the voltage? If the voltage is more than 13 volts, what is the voltage between the battery terminals?
Saturday, February 6th, 2010 AT 8:55 PM