Skip the auto shop - Our mechanics make house calls

Q: New battery. Starter and alternator and car will not stay charged

asked by on

I have replaced a transmissiin batter a.starter and alternator and my olds will not stay charged. After a min.. It shuts up. I was driving it as soon as i put the blinker on..it went dead. Plz help me. Is it electrical

My car has 90 miles.
My car has an automatic transmission.

A: Yes, this does sound like an electrical iss...

Yes, this does sound like an electrical issue. Here’s what you can do:

  • With the vehicle running, use a multimeter to check voltage at the battery. It should read somewhere near 14 volts, give or take .5 volts, if it is charging properly.

  • If voltage is 12.6 or less, the alternator is not charging the battery.

  • Also check for power at the alternator, with the engine running, just in case the battery wire is no good.

If you cant find the issue, a certified technician should be able to determine the exact cause of your battery not holding a charge.

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: Electrical problem

Hello. If you have an electrical issue with your vehicle, the best thing to do is to get an electrical systems inspection from a qualified mechanic with a digital multimeter. You will be able to explain your exact symptoms to...

Q: Alternator making noise

The charging system would need to be checked to see if it is charging, or killing the battery; the alternator is most likely the cause. I recommend that you have a mechanic, such as one from YourMechanic, come by and...

Q: Car won't start after I changed the fuel pump. It was dying and back firing before I changed it. Could it just be low on gas now?

Hi, thanks for writing in. I recommend listening to hear if the fuel pump is running during cranking, and checking fuel pressure. Should be at least 10 psi. If the pump is not running, check the fuel pump fuse(s) and...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.