Skip the auto shop - Our mechanics make house calls

Q: Possible defective alternator

asked by on

We think our new alternator is defective.

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
  1. Home
  2. Questions
  3. Possible defective alternator

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: Car not starting after submersion

Hi your car will need extensive disassembly due to the car being submerged six months ago. The parts will need to be set out to dry or be replaced. The electrical components will need to be blown out with compressed...

Q: Battery draining

Yes it is possible you need an alternator, depending on when and how the battery drains. If your battery drains while you are driving your vehicle, chances are good that you might need to replace the alternator. If the battery...

Q: When I went to change the timing belt there were 25 teeth were missing but it didn't jump time - how is this possible?

Not all the teeth need to be present in order for the pulleys to turn. However, the only way to tell if the cam and crankshaft were really in the right position relative to one another is to line them...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.