Skip the auto shop - Our mechanics make house calls

Q: Alternator draining battery

asked by on

The alternator is draining my battery.

A: Hi there. If the alternator is not properly...

Hi there. If the alternator is not properly charging then the battery will die over time. The alternator needs to be load tested to see if it is going bad. Bad connections at the alternator and at the battery can act like a bad alternator so all of the connections should be checked first. If the connections are fine, it is still not charging then the alternator will more than likely need to be replaced. If you are going to have this done, consider using YourMechanic, as a certified mechanic can come to your home or office to diagnose your vehicle and replace your alternator if needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: Oil light is on

There are a variety of possibilities that could be at play here. The oil light may have come on due to low oil pressure which may be what has caused the rattling you hear. If this is the case, there...

Q: Car pulls right. Suspension play? New Falken Ziex tires 5,000 miles ago

A vibration felt when braking is most likely warped rotors. It's not possible to determine whether the items the shop recommended are worn without inspecting the vehicle firsthand. From your description, it does sound like your ball joints are worn....

Q: Would a broken or disengaged e-brake cause my car to make a rubbing noise while driving at low speeds and reversing?

Hi there. It is important to have this noise checked before it becomes a serious safety issue. An e-brake that is not engaging should not cause the noise you have described unless a part has come loose or there is...

Related articles

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...
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...