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1998 Cadillac Catera Question: alternator not charging

 

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Visitor, 3.0L V6, Sandusky, OH, October 25, 2010, 15:39

new alternator not charging

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  • Answer #1

    ZeeTech October 25, 2010, 17:01
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     Master

    Well, you need a newer one. Is this a rebuilt AutoZone alternator?

    Zee

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  • Answer #2

    patrick mannion from Greg Solow's Engine Room, October 25, 2010, 19:53
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     Master

    Turn on the ignition switch to the on but not run position do you see an icon on the instrument panel representing a battery, if you do not see this battery icon the alternator is not seeing power to allow it to charge. Start the engine does the battery icon go out. A more complex but good diagnostic test is checking "voltage drop" on the battery ground and power cables. You can find a video on how to do a voltage drop test on youtube. Put a volt meter across the battery terminals with the engine off, at rest the battery voltage should be 12.6 volts if the battery is fully charged. Now get a friend to start the car while you watch the voltmeter, the voltage reading across the battery should read approximately 14.6 volts if the alternator is charging correctly.

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