Skip the auto shop - Our mechanics make house calls

Q: New battery, but have to keep jumping car

asked by on

Got new battery a month ago. One weekend, after sitting all weekend it wouldn't start. Jumped the car and then it worked all week long. Next weekend, same issue. Jumped car last night, but wouldn't start this morning.

My car has 94000 miles.
My car has an automatic transmission.

Hi There, It sounds like you may have a faulty alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator. The voltage regulator is a unit that regulates the charging of the battery by the alternator and maintaining a certain amperage while the engine runs. When the alternator is not working properly, this may result in the battery quickly losing charge and the car losing all power as you have described. You may also notice a whining sound as a result of the bearings inside the alternator begin to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your 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

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: How do you check the level of coolant in the radiator?

In most situations, you shouldn’t have to check the radiator itself. You should be able to inspect the level of coolant in the reservoir/reserve tank instead. However, if the there is no coolant in the reserve tank, you’ll need to...

Q: Car clicks but won't turn on or crank.

Depending on the speed of the clicking sound, this may be either a weak battery or potentially a failing starter solenoid. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter....

Q: How do I properly wear a seat belt?

Your car has lap and shoulder seat belts for all five seats. Seat belts are extremely important safety features, and should be worn whenever the car is moving. There are a few keys to making sure that you are wearing...

Related articles

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.
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.