Battery light

2005 CHEVROLET COLORADO
197,000 MILES • 5 CYL • 4WD • MANUAL
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CAROLYNNEL2
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I have an issue with the battery light. I replaced the battery and I replaced the alternator twice. also I changed the main fuse and it's still lit. what else should I check?
Jan 9, 2019 at 3:42 PM
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ASEMASTER6371
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Good evening,

You need to check the actual charge rate at the battery with the engine running. it should be 14 to 14.5 volts.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

I will attach a wiring diagram for you to view as well.

do you have a voltmeter to do some wiring test? the PCM controls turning on and off the alternator system.

Roy
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Jan 9, 2019 at 5:12 PM
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CAROLYNNEL2
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I have an issue with the gas tank sending unit because it fluctuates between full and empty. could that cause my issue too?
Jan 10, 2019 at 8:27 AM
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ASEMASTER6371
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No, that is a separate issue.

Roy
Jan 10, 2019 at 8:55 AM
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CAROLYNNEL2
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Okay.
Jan 10, 2019 at 12:17 PM
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ASEMASTER6371
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Let me know the results so we can continue.

Roy
Jan 10, 2019 at 12:24 PM
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CAROLYNNEL2
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Thank you, I definitely will.
Jan 10, 2019 at 12:38 PM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Jan 10, 2019 at 12:40 PM
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CAROLYNNEL2
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The alternator was bad I replaced it twice. Third time's a charm thank you so much for your help.
Jan 11, 2019 at 2:52 PM
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ASEMASTER6371
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You're welcome.

Always glad to help.

Roy
Jan 11, 2019 at 3:15 PM