Question about 2002 Pontiac Montana
I was going to say its a bad voltage regulator. but you put on a new alternator. so check the battery cables carefully to be sure there clean and tight., and also the wire from alternator to battery. and check all engine to body grounds. One is to clean/check all connections.
Your voltage regulator will have a smaller wire that hooks to the battery cable at some point, usually the starter relay (solenoid),
Make sure that connection is SECURE.
have a good day ! hope this steers you in the right way.
Posted on Mar 14, 2011
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Posted on Jan 02, 2017
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