Q: altinater is fine but battery light keeps coming on what could be the problem? came on 7 times while on the road

asked by on

battery light continue to come on after altnator checked out ok same thing still occurs

My car has 234465 miles.
My car has an automatic transmission.

The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the battery passes a load test be sure it is NOT a marginal pass in which case you should install a new battery to reduce diagnostic headaches as you seek a resolution to this. Batteries are a VERY important component in a car’s electrical system and the battery must be fully functioning to avoid electrical glitches. If the battery tests OK, you could have an intermittent fault in the charging circuit and that includes wiring, components, fuses, terminals, grounds, and so forth. Intermittent faults can be found using a data logger or, in your case, simply testing alternator output right at the moment the battery light comes on. An inadequately tensioned serpentine belt can also cause the issue you are reporting. If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a battery light diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. altinater is fine but battery light keeps coming on what could be the problem? came on 7 times while on the road

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: Glow plug warning light even after changing glow plugs

The glow plug warning light doesn't necessarily mean the car needs glow plugs. The engine control unit turns on the light to alert you that it has detected a fault in some component of the system, not just the glow...

Q: Charging problem - 1999 Cadillac DeVille

First, you should check for injector pulse and fuel pressure. If either of these are not working, then there are some specific diagnostic paths to follow. If it is only spark you are missing, check all the fuses. Make...

Q: I was driving and the light on the dash board become dime and the engine was on. The car refused to start. Only clicking sound

The battery will not get recharged after jump starting with another battery if the alternator is not working to recharge it. You should have the battery recharged and charging system diagnosed to see if the alternator needs to be replaced....

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...
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...
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.