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Originally Posted by ACM
yes the voltage is low about 10 Volts.
So most likely is the voltage regulator.
Anyway to test the regulator it self?
Auto zone said that they can not test it by itself
thanks
ACM
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. . probably just the brushes. Try this; with engine running, tap the back part of the altenator with a small hammer. If the voltage jumps to 14.x volts w/ engine running, it's the brushes.
If the alt was fried, you would a faint glow for the battery icon in the IC.