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Info center is telling me "battery not charging"?

Tiny
PAPERCHASER40272
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 260,000 MILES
My issue is the info center is telling me "battery not charging".

•Truck overheated while driving so I pulled over and checked my fluids and found that I was low on oil, but all other fluids/reservoirs were fine.

• Replaced the water pump, thermostat, oil and oil filter.

•overheating issue fixed. Now the battery light and said message appeared.

• Replaced serpentine belt and alternator but nothing changed.

•Battery only reading 11.3Volts (less than one year old) voltage at alternator while running is the same as battery.

Help!
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Monday, July 5th, 2021 AT 11:43 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

Have you had the alternator bench tested? It sounds like it may be bad. Also, there is a fusible link between the battery and the alternator. I need to confirm there is power to the alt at the red wire on it. Check this with everything off.

I attached the wiring schematic below for the charging system. Check that for me and let me know what you find. Also, here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Take care,

Joe

See pics below.
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Monday, July 5th, 2021 AT 8:51 PM

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