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

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・Save up to 30%

Get a quote

What others are asking

Q: Installing a new BCM, 2009 Pontiac G8

According to the factory repair information, a replacement BCM must be programmed using OEM equipment. It states the vehicle will not start and many other functions will not operate properly until programming has taken place. My advice is to have...

Q: Can 2 serpentine belts need replacing within 11 years and can the alternator suddenly fail without warning ?

Hello. There is a huge variance in manufacturer estimates of serpentine belt lifetime. This is understandable because operating conditions vary, vehicle designs vary and the belt material will degrade at different rates. You should get at least 50,000 miles out...

Q: Front of car makes popping noise

This sounds like it could be a serious issue and should be looked at. Several items could cause a noise such as this when braking. A failing lower ball joint is one such possibility the other could be worn or...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...