Skip the auto shop - Our mechanics make house calls

Q: New alternator and battery checks out fine but cars still dying and electrical issues.

asked by on

I got a brand new alternator put in thinking it was what was causing my headlights to dim and brighten, radio to turn on and off and abs and parking break lights to be on. The same problems are still happening. Battery checked out fine. 3 seperate occasions all the lights come on and the car stops, I have to turn it off and back on and then it's fine. 2 other times I turned the key and the car wouldn't start but a couple minutes later turned on fine.

My car has 112720 miles.
My car has an automatic transmission.

Hi, thanks for writing in. It sounds like there may be a problem in the wiring, a faulty connection, or even a control module. It is going to take some diagnostic work to determine exactly where the problem is located. I suggest a certified mechanic, like those available at YourMechanic.com, to find the source of the issue. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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!
  • Home
  • Questions
  • New alternator and battery checks out fine but cars still dying and electrical issues.

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: Engine stalls when the brakes are applied

Hello. From what you describe it would appear that your vehicle may be experiencing possible engine management or transmission issues. The symptoms you describe can commonly be caused by faulty idle air control valve. The idle air control valve is...

Q: Check engine light refuses to go off after engine replaced

Hello there, you have a long series of issues going on with your 2013 Hyundai Sonata. If you keep getting a repeating oil light on than there is likely a fault in that system. Since this fault has lasted after...

Q: i have 2006 buick lacrosse it run hot wont start back up it turns over just wont catch to start

Hi there: If you're Buick LaCrosse is experiencing overheating issues, it's possible that you have suffered severe internal engine damage or damage to ignition system components such as your crankshaft position sensor or the electrical harnesses connected to these components....

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...