check battery alarm - shuts down engine

2005 ISUZU NPR
20,000 MILES
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KNUCKLEHEAD
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First morning start up, after about 30 secs the check battery alarm comes back on and shuts down engine. Usually after 3rd restart I can pull out and start driving with the alarm coming on then off occasionally but without engine shut down. pre-start battery voltage 12.5 (cleaned terminals/cable connections, and main ground), replaced alternator, still have same issue
Nov 17, 2011 at 5:37 PM
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RASMATAZ
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Possibly could be coming from the computer controlled of the alternator's field generation circuit-have it checked out-
Nov 17, 2011 at 6:20 PM