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Some vehicles have an external voltage regulator which also controls the warning lamp circuit, some vehicles have a warning lamp relay and others may operate through a computor, all of which require a signal from the alternator. You either have a faulty regulator/relay/computor, A broken signal wire from alternator, alternator is incorrectly wired or a faulty/incorrect type of alternator

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โˆ™ 2007-08-29 09:55:32
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Q: How do you get the battery light to go off if you have a new alternator and a new battery?
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