Q: My car battery is dead but the brake light on dashboard is on

asked by on

So my car battery is dead, but why is the brake light on my dashboard illuminated?

My car has 134000 miles.
My car has an automatic transmission.

Hello and thanks for writing in. Often times many dash lights will illuminate when the battery is dead, indicating that a particular system (in this case the braking system) does not have the proper voltage to it. This is inherently the problem any time a battery is dead as every system in the car draws a specific amount of power from the battery or car’s charging system. I would suggest having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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. My car battery is dead but the brake light on dashboard is 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: Car goes into gear but won't move. Oil leak after hitting dip

If the tires won't turn, but the car will go into gear, I would first check that the parking brake is not enabled, keeping the vehicle from moving. If that is not the case, I would then recommend having a...

Q: Can a leaking intake manifold cause surging on my 93 Chevy Silverado 1500

Hello. A leaking intake manifold gasket can definitely cause the vehicle to run like this. It will not only cause excessive amounts of air to enter the engine, but it will also cause the sensors to not read right. It...

Q: Transmission works until engine warms up then the rpms jump and transmission won't change gears could it be the IAC? 03 cavalier

The idle air control valve will not affect transmission shift points. The throttle position sensor might though and there are other transmission controls, including electrically controlled solenoids in the transmission valve body, that might be at issue. It first has...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.