Skip the auto shop - Our mechanics make house calls

Q: will not keep a charge

asked by on

will not keep charge on the battery

A: The battery and charging system will need t...

The battery and charging system will need to be tested to see if the battery can be charged and handles a load test. If battery fails test then it should be replaced first. After the battery is tested and replaced, if needed, the alternator can be tested to make sure it is charging the battery to keep the voltage above 13.2 volts and below 14 volts. If the alternator amperage output is about 60 amps and is not within 90% of rated capacity, then replace it. The alternator may be a higher rated alternator and should test at 90% rated amperage capacity. If you need help replacing your battery or alternator, YourMechanic offers a repair and diagnosis service preformed by a mobile, professional mechanic that will commute to your location for this repair.

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: Is my aftermarket stereo draining my battery?

A properly installed system should not drain your battery in 4 days. Obviously, the simplest way to rule it out would be to disconnect the stereo for a few days and see if that remedies your problem. If it does,...

Q: Car gets hot sometimes. I unplugged the temperature sensor, turned on my air, and switched relays, and my radiator fans still don't work

Hey there. You should have the cooling fans checked to see if the cooling fans are getting power from the control system. The overheating diagnosis may show the system fan relays are not being turned on by the computer. Only...

Q: Coolant is leaking

The cooling system water pump is the most likely failure, but with a car that is over 20 years old, anything is possible to be leaking. I recommend that you have a mechanic, like the ones from YourMechanic, come to...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.