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

Slow acceleration with loud full body vibrations 2005 Ford Focus

Hello - it is quite likely that one or both the axles/CV joint assemblies on your Focus are worn out. Loose motion from wear in the CV joints causes a distorted motion of the axle, and vibration as your are...

Weak battery or alternator?

This may be a sign of a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while...

Car won't turn over or start

You likely have an ignition switch problem, which is common with your vehicle. You could also have a starter relay problem, which could cause the same issue. The only way to verify the problem is to have an in-person inspection....

Related articles

All About Car Battery Chargers
Everyone Everyone has experienced a dead car battery from time to time. It’s common occurance, especially in winter, when batteries have to work even harder to get you to where you want to go. Fortunately, there’s a solution. A portable...
How Does a Push-Button Start Work?
For the vast majority of people, cranking your car involves getting the key out, sliding it into the ignition, and turning...
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...