I notice the battery warning light and brake warning light come on the same time?

2003 NISSAN ALTIMA
87,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
NIKABELLA
  • MEMBER
  • 1 POST
sometimes when i am in drive mode I notice the battery light and brake light come on the same time. I had a new battery installed last year and i just had new front brakes put on 2 weeks ago. I was told I need new back brakes. ; But the battery and brake lights come simultaneously. Please advise. Thanks !
Oct 1, 2008 at 3:03 PM
Advertisement
Avatar
SQM
  • CERTIFIED EXPERT
  • 6,383 POSTS
Hello,

The brake warning light can be illuminated due to low brake fluid, engaged parking brake, bad master cylinder or a defective proportioning valve.
Verify that the parking brake is in fully released position, brake fluid is at correct level.

Take a look at this article, it covers the typical issues:

https://www.2carpros.com/articles/brake-system-warning-light-on

The battery light comes on when the battery does not get charged properly by the alternator. Typically, it points to a bad alternator or a wiring issue from the alternator to the battery.
When the battery light gets triggered, a good first step would be to test the alternator output to the battery. It should be 13.6V to 15.2V with the engine running.

Here is a helpful guide:

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

Please let me know if you have any questions.
Thank you.
Image (Click to enlarge)
Attached Media
Nov 5, 2021 at 6:41 AM