Skip the auto shop - Our mechanics make house calls

Q: battery not charging light came on

asked by on

Started engine yesterday battery not charging light came on, gauge show it was out putting 6 to 9 volts. Check Battery terminals to make sure they were clean and getting good contact. Made sure belts were not off, etc. Came out next morning ready to remove the battery and alternator for testing. Started the truck and battery not charging light came on an then went off as out put climbed to normal 14 volts.

What is getting ready to go bad?

My car has 109000 miles.
My car has an automatic transmission.

A: I would still recommend getting the alterna...

I would still recommend getting the alternator and battery tested. The most likely cause would be the alternator. The alternator can have an intermittent failure that causes it to charge and not charge randomly. If this turns out to be the case after testing, I would recommend having the alternator replaced. I would also be a good idea to have the battery fully charged while the alternator is being replaced to ensure that the vehicle starts easily. If you need help testing the vehicle, a certified professional from YourMechanic can come to your car’s location to diagnose the battery light and proceed with the correct repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Need to replace the broken alternator on my car with a salvaged part

Alternators will generally have their current rating printed on a label on the back of the alternator. You will want to select one with an equal or higher rating than the one you are replacing. Always make sure the battery...

Q: My Battery Charge System Light is on. Has my alternator or battery gone bad?

There are two key tasks in a charging system diagnostic initially: one is to measure the output of the alternator, at the battery terminals, and compare that output against the factory specs; and the second is to load test the...

Q: Check Engine light repeatedly lights up no matter what

There is an original equipment manufacturer (OEM) campaign 14515b that is calling for the chassis control module. The module has a problem that it has corrosion internally causing random check engine lights and possible engine stall or fail to start....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...