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Re: my battery is new, battery light went on when driving
I've bought new batteries before, only to have them turn out to be defective. Run the car by the battery shop to have it tested, and if it checks out OK, then run it by the alternator shop to have them check the alternator output.
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Have you checked the alternator, I work at a auto parts store and see this all the time, check the inline fuel filter, also have your checked the coil, mine went out and that was the last thing I checked but am back on the road.
So what do you have for voltage at the battery?
Sounds like the alternator went bad. There should be around 14 volts at the battery with the engine running. Anything less and the alternator would be the first thing I suspected.
This definetly sounds like an alternator problem........but to definetly check this.....grab a multimeter, and check the voltage at the battery whilst the engine is running/idling, the voltage should be around 13.8v and 14.2v,,,,,,,let me know how it goes !!
most probably based on your description your battery has completely failed-may have a sudden, internal short. Put a voltage meter on the battery posts, if it is less than 12 volts, you need a new battery. A digital meter only costs $15 at any decent hardware store or retail auto supply store.