Why is the "battery not chraging" light on?

Asked by Oct 24, 2014 at 02:28 PM about the 2003 GMC Yukon SLE 4WD

Question type: Maintenance & Repair

I had my alternator and battery changed also tested after them being changed out. The "battery not charging" light is still coming on why is that?

4 Answers

7,655

charge your battery start your car let it run for 30 min and come back and see if it really isn't charging

3 of 3 people found this helpful.

Well I did all that. It starts fine, just not sure if we need to do something like reboot I don't know..

237,275

Sometimes those rebuilt alternators are bad out of the box, do what crumbob suggested and put a voltmeter on the battery while running, is it at 14V? If not then, your going to have to replace the alternator with another one. If you don't have a meter, you can have the auto parts store check it for you.

1 of 1 people found this helpful.
18,235

The diodes may be going bad. I've seen a few test good but after swapping to a new one the light goes out. The indicator is very sensitive on these gm trucks. They throw the light before the problem is to the point damage is done.

2 of 2 people found this helpful.

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