Skip the auto shop - Our mechanics make house calls

Q: Car wont stay running with a new battery

asked by on

Car won't stay running copper coils in the alternator was glowing red and the battery is brand new
My car has an automatic transmission.

Hi There, It sounds like you may have a faulty voltage regulator that may be over charging your battery. You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to. The voltage regulator is a unit that regulates the charging of the battery by the alternator. When the voltage regulator is not working properly, this may result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. A common sign of this is usually the acid inside the battery boiling causing the battery to swell. You may also smell a bit of smoke due to things potentially getting too hot. In other cases it may result in the alternator not supplying enough power to the battery, resulting in undercharging the battery or not charging it at all. I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.

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: accidentally added windshield washer to coolant line instead of washer tub, just a little, maybe 1/8 of a gallon.

Hi there. A little window washer fluid will not cause any damage to your engine or the cooling system, in fact it will actually make the system work a little better as the fluid has alcohol in it. Alcohol will...

Q: Multiple system failures

I recommend having a mechanic, such as one from YourMechanic, run a full diagnostic on your brakes, steering and suspension systems, in order to identify and quote the repairs needed.

Q: My car is leaking engine oil from under the car in a mass amount what could be causing this to happen?

The lower oil pan is an engine component that is close to the road and thus, if impacted, could be one possible leak point. Road debris impacting the oil pan can cause it to split, tear, or crack. Oil pans...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.
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.