Battery will not stay charged

2000 CHEVROLET IMPALA

225,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC

SAMGREW

MEMBER
59 POSTS

Replaced alternator when first started fine, then a few minutes battery light comes on and battery will drain out. Also replaced battery, no change. Also only code is fan control.

Jul 21, 2021 at 1:44 AM

SQM

✓Experienced Mechanic
6,383 POSTS

Hello,

Almost sounds like a wiring issue.
Have you got a chance to make sure the main charging wire from the alternator to the battery is in good condition and attached securely? If not take a look at that wire as well as the battery terminals.

https://www.2carpros.com/articles/how-a-car-electrical-system-works

I have attached the charging system wiring diagram for your reference. Also included diagnostics steps.

Please let me know if you are able to get this resolved.

Thank you.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jul 21, 2021 at 10:28 AM

SAMGREW

MEMBER
59 POSTS

Found broken wire. Replaced it. Everything working great. Thank you very much.

Jul 23, 2021 at 3:47 AM

SQM

✓Experienced Mechanic
6,383 POSTS

I am glad you were able to fix.
Feel free to reach out to me if you have any questions.
Thank you.

Jul 23, 2021 at 3:38 PM

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