Q: Car battery dead.

asked by on January 11, 2016

The car battery is dead. The car was stalling upon startup and turning on the headlights seemed to affect the power of the engine.

Hello, it sound like your charging system is not charging the battery. The alternator which puts out 12 to 14v DC charges the battery and supplies power to run all the electrical consumers when the engine is running. With the alternator not having any output, when the engine is running and you turn on the headlamps, the headlamp puts an excessive load on the battery and cause low voltage to the ignition and fuel injection system cause a lack of power. This is something you should have looked at sooner that later of you might get stranded and have to have the vehicle towed. You might need the aid of mechanic to test the charging system and have it replaced as necessary.

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

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

What could be wrong with my truck?

When you have a vehicle that is 27 years old it can be most anything causing the vehicle to hesitate. Depending on the engine you have you may have a sensor issue that is not working correct or a fuel...

Why is the car losing power and not accelerating? 1995 BMW 318is

Hello and thank you for contacting YourMechanic. Check the ground wire from the main engine to frame ground to the right side engine mount. If this wire is corroded or loose, this will cause the engine to loose power on...

How do I extend the remote start?

Unless set otherwise, your engine will run for 10 minutes after being turned on via remote start. After 10 minutes, if the car has not been operated, the engine will turn off. You can extend the remote start time at...

Related articles

How to Replace an Ignition Trigger
The ignition trigger fails if the engine is misfiring or has trouble starting. The check engine light may illuminate if the ignition trigger fails.
How Can I Prevent My Car Battery From Dying?
Your Your car battery is one of the most important parts of your car’s electrical system. Without the battery, your car simply isn’t going to work. Your battery works hard, and eventually, it’s going to wear out. So, how long...
What Causes Spark Plugs to Wear Out?
Without operational spark plugs, your engine won’t run. If even just one plug were to fail, the change in functionality would...