Q: Q: Battery and brake lights on

asked by on

The battery and brake lights are illuminated on the dash.

Hello. The battery light being displayed on the dashboard is a common indicator of a faulty alternator. The alternator supplies proper power to the vehicle while the engine is running. If it fails, the vehicle wont be able to supply the needed voltages to properly power the braking system, which is why the brake light came on. I suggest that the starting and charging system is tested for issues. Faulty alternators will often cause a vehicle to shut off and require towing. If you need further assistance, I recommend you have a mechanic, like one from YourMechanic, inspect the illuminated lights and make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Q: Battery and brake lights 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: Hyundai - hard to put in gear and odd noise

Hello - I suspect the pilot bearing in your clutch assembly is seizing up. When you press the clutch pedal, this seized bearing tries to keep turning the input shaft to the transmission, even though the clutch has released that...

Q: Brake lights out in a 2005 Toyota Highlander

Your suspicions about the connector being faulty would be supported by your symptoms, but a blown fuse would result in none of the brake lights working. I would suggest having a certified mechanic like one from YourMechanic inspect your brake...

Q: Check Battery light still on

Hi. The system is not charging because of the symptoms mentioned. A new alternator does not always mean it is a good one. The wiring will need to be checked. There is a 150 amp fuse you can check. There...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...