Skip the auto shop - Our mechanics make house calls

Q: Possible defective alternator

asked by on

We think our new alternator is defective.

A: Hello. The best thing to do would be to tes...

Hello. The best thing to do would be to test your battery and alternator to check to see whether your alternator is defective or if your having a battery issue. The battery starts your car, then the alternator takes over powering the car and charging the battery. If the alternator is bad the battery will not get charged and the Battery Light should come on. The battery and alternator check can be done by a certified technician, like one from YourMechanic. They will be able to diagnose your issue and replace your alternator if necessary.

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・Save up to 30%

Get a quote

What others are asking

Q: Possible alternator problem

Hi. An illuminated dashboard charging light is almost a sure sign that the alternator needs to be replaced. If the light is not on and you suspect a problem with the alternator, there are a few ways to test it....

Q: Charging and starting - 2008 Chrysler Sebring

Code P0622 relates to the alternator not working properly. This code can sometimes come up when the battery is weak. I would recommend testing the battery first and if it checks out OK, then the problem is likely the alternator....

Q: Car is overheating and boiling water out. 2003 Hyundai Elantra

Hello - you may very well be correct. Given your symptoms, it sounds like you have a blown headgasket. This can be confirmed by checking for low compression between adjacent cylinders, white steam or smoke from the exhaust (smells sweet),...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...