Q: Potential electrical issue? Already replaced alternator and battery.

asked by on

One day, my radio cut out while driving, I had to manually assist in bringing my windows back up, the dash lights were dimming, and the gauges were rapidly going back and forth or completely dead (even though the car was moving). After shutting it off at home, it wouldn't start again. Mechanic replaced the battery for me and the car was running great for about 3 weeks. Then the same symptoms happened again. I took it back and they said the issue could've been missed the first time if the alternator was intermittently failing. So, they replaced the alternator. Again, the car was running great for another 3-4 weeks. I just experienced the same exact symptoms as described above. Is this something deeper than battery and alternator? Any experience or advice would be appreciated.

My car has 137000 miles.
My car has an automatic transmission.

Hi there. I understand how frustrating things like this can be. I don’t think you have any serious underlying electrical problems with the car. What I believe may be happening is simply a case of bad luck with aftermarket parts; this is not as uncommon as you would think.

You may have had any combination of bad battery and alternator. It is unfortunate, but these items will need to be retested and confirmed whether or not this is the case. If they do test ok, then we would be sure there is an underlying issue.

A quick visual of the battery terminals and alternator belt are easy ways to check the little things that get overlooked the most; a loose terminal or belt has a direct affect of the vehicle’s charging and electrical system.

YourMechanic has several available technicians that can assist you with an electrical problems inspection and provide an estimate and direction of repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Potential electrical issue? Already replaced alternator and battery.

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: Car racing and idling high

Hi, these cars have developed many idle issues over the years and there are a few things to check. All the linkages for the throttle should be inspected to make sure that when you release the pedal, the return spring...

Q: Q: Car won't start

Hi there. Usually when your engine will crank over but will not ignite, it's caused by a fuel or ignition system component failure, ranging from a crankshaft position sensor to mass air flow sensor, O2 sensors or simply clogged fuel...

Q: The car is not starting after I changed the aux cable in the stereo.

To begin with, the lighting and door lock modules are very sensitive to low battery voltage. Once the battery voltage drops, they can start to do crazy things, making the car appear haunted. Door locks and windows may start to...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.