Q: Installed a new battery and the battery light is still on

asked by on

I recently installed a new battery in my car and I drove it but the battery light came on and then today it stopped on me again.
My car has an automatic transmission.

This may be a sign of a failing alternator or voltage regulator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator. The voltage regulator is a unit that regulates the charging of the battery by the alternator and maintaining a certain amperage while the engine runs. When the alternator is not working properly, this may result in the battery quickly losing charge causing the battery light to come on as you have indicated. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your charging system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Installed a new battery and the battery light is still on

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: My car keeps stalling in the rain and causing battery to die or go low. Bad distributor causing a short?

Hi there. In most cases, a gradual power drain like you've described is commonly due to an electrical short in the charging system. Although the alternator itself might test good, there are several wires and connectors that could be damaged,...

Q: Battery light on or off while driving won't start now

The battery should be load tested. If the battery fails the load test, the battery should be replaced. If you need to schedule battery replacement service, please schedule via YourMechanic's battery replacement service request page. If you request battery replacement,...

Q: How do you work the manual rearview mirror?

Your car’s rearview mirror provides essential visibility out of the back window. However, you will need to adjust it periodically, as well as after anyone else has driven the car. Here’s what you need to do: Grasp the mirror...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...