Battery light turned on battery not charging message, then service brake booster message as well

Tiny
CHEVYDAVE420
  • MEMBER
  • 2003 CHEVROLET SUBURBAN
  • 228,000 MILES
Started my truck this morning and the battery light came on with battery not charging message on the dash and then service brake booster message as well. I hear the same noise and feel the vibration in the brake pedal but it didn't last but just a minute and went away but the battery not charging message and battery light have continued all day is I've been driving. Did you pinpoint the issue? What is the solution?
Thursday, April 30th, 2020 AT 2:44 PM

14 Replies

Tiny
CHEVYDAVE420
  • MEMBER
  • 9 POSTS
Sorry, I'm new to this but I posted the question after reading this guy's post with the exact same issues. I've included a screenshot. Since the initial issue the blower fan on the air conditioner has started acting up, not going up or down normally with the fan switch and then remaining on low after turning the engine off. I don't know if these are related but they happened in the same day!
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Thursday, April 30th, 2020 AT 10:21 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Good morning,

Do you have a voltmeter to do some testing at the battery?

You need to check the voltage with the engine off. Then run the engine and see what the voltage reads. You should have 14 to 14.5 volts with it running.

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

https://www.2carpros.com/articles/car-battery-load-test

I also attached a wiring diagram for you. Verify power to the back of the alternator.

Roy
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Friday, May 1st, 2020 AT 6:07 AM
Tiny
CHEVYDAVE420
  • MEMBER
  • 9 POSTS
I don't have a meter but the battery is less than a year old.
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Friday, May 1st, 2020 AT 6:09 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, you can get a cheap meter at a parts store for the test. Once you get a meter, we can do some testing to narrow the area of failure.

Parts stores, Harbor Freight and such have them for about $10.00 to $15.00.

Roy
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Friday, May 1st, 2020 AT 6:26 AM
Tiny
CHEVYDAVE420
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Okay, thanks! I was really hoping to get in touch with the guy who posted previously in March with identical issues and see if you figured it out. Is there any way to contact him?
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Friday, May 1st, 2020 AT 6:37 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I can send this to the Admin for this for you. If it has to do with the battery issue, you can continue here.

If it is the other issue, you need to start a new question as we can only answer one issue at a time per question.

Roy
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Friday, May 1st, 2020 AT 6:43 AM
Tiny
CHEVYDAVE420
  • MEMBER
  • 9 POSTS
Okay thanks. His username was SUBURBAN03.
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Friday, May 1st, 2020 AT 6:50 AM
Tiny
CHEVYDAVE420
  • MEMBER
  • 9 POSTS
I just figured since he had the exact same identical issue that it may be quick and easy to find out what he did to fix it if you figured it out.
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Friday, May 1st, 2020 AT 6:50 AM
Tiny
ASEMASTER6371
  • MECHANIC
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We give suggestions for the repair and repair procedures but they do not always respond with telling us if the car was fixed. At times, I always think no news was good news.

We will check.

Roy
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Friday, May 1st, 2020 AT 7:07 AM
Tiny
CHEVYDAVE420
  • MEMBER
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Lol, I heard that! Thank you very much for your time!
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Friday, May 1st, 2020 AT 7:08 AM
Tiny
ASEMASTER6371
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You are welcome. I sent a request for a transcript of the question you asked about.

Roy
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Friday, May 1st, 2020 AT 7:23 AM
Tiny
CHEVYDAVE420
  • MEMBER
  • 9 POSTS
Thanks.
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Friday, May 1st, 2020 AT 7:25 AM
Tiny
CHEVYDAVE420
  • MEMBER
  • 9 POSTS
Battery light just came on and stayed on and gauge dropped to nothing. I managed to get to my buddies house but the battery is completely dead and the truck won't start.
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Friday, May 1st, 2020 AT 10:12 AM
Tiny
ASEMASTER6371
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Okay, you need to charge the battery back up to 12.6 volts.

https://www.2carpros.com/articles/how-to-charge-your-car-battery

Then start it and check the voltage at the battery with a voltmeter and tell me the voltage.

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

Roy
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Friday, May 1st, 2020 AT 10:17 AM

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