Q: Charning issues, new battery and alternator

asked by on

I've recently had the battery and alternator replaced with new ones on my car. Despite that, it seems to have some problems with charging. The voltmeter would go into the red zone each time I had the headlights turned on along with the wipers and the heat. The charging is normal when everything is turned off. Why is this happening?

Hello there. There are a few potential causes for why the car would have charging faults even after the alternator is replaced. The most common would be the battery cable, shorted harness, battery, or a failed alternator. The first thing a technician will do is to check for charging voltage and the alternator output. If the alternator output is below spec. It would be bench tested to rule it out as the fault before any more diagnosis is performed. A qualified technician, such as one from YourMechanic, will be able to perform a diagnosis on the charging issue and let you know what repairs or adjustments are needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. Charning issues, new battery and 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: My brake pedals squeaks when I release the brake and then press the accelerator.

Hello. A squeaky brake pedal can be caused by a few different things. The most common reason for a squeaky brake pedal is a brake pedal mechanism that needs to be lubricated. The brake pedal has moving parts which can...

Q: electrical ( headlights )

It is possible both bulbs are burned out. The low beam filament in each bulb should be tested with an ohmmeter. The bulbs can also be powered off the car to see if both filaments work but be wary of...

Q: I've got a stock 350 with an edelbrock 1406 carb I just put on that I bought used. It has a dead spot in the accelerator so I chan

Hello. From what you describe it would appear that the carburetor may need to be tuned or adjusted. Every engine runs differently, so in most cases, when a new or different carburetor is installed on an engine it will need...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.