Car will not stay charged

Tiny
CHRISSY JOSEY
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 187,509 MILES
I was driving my car and out of no where my car started having a strang bonking sound coming out of the speakers. It was a loud bonking then about a 15-20 second silent before the bonking sound again. Not long after the strange sound my headlight went extremely dim and everything in my car shut off. The heated seats along with the electric windows and the trunk button. Nothing would work! Then 5 minutes later the whole car shut off. It wouldn't charge or jump off with jumper cables. I have replaced 2 alternators and 2 batteries. The charging system failure shows on the odometer reader. Along with traction control and battery saver active.
Monday, February 22nd, 2021 AT 2:51 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Just to clarify, you have replaced two batteries and alternators since this has happened?

I agree that this sounds just like the voltage is too low and all these systems are shutting down.

I would suggest testing the battery and alternator at the same time.

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

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

Let's start with this and go from there.
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Tuesday, February 23rd, 2021 AT 5:57 PM

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