Well the same thing happened to me and a mechanic said that i had to replace the alternator. He said it would cost around $400 which i think is a little high but idk. Take the car to a mechanic that looks honest and have him look at it. He will test for the voltage and it should be around 14 volts. But for older cars it will be a little bit lower around 13.5 volts. If its anything less than 12 volts u probably need a new alternator.
Battery is dead?
The computer only resets when the battery is removed. The alternator just charges the battery, so if the battery is left connected when the alternator is replaced, the computer should not reset.
Most likely the problem is your alternator....the battery light actually does not monitor battery condition, only the charging system. I'd check the voltage regulator and the fuses first. The fuses are the cheapest fix and the voltage regulator will run about 25% less than an alternator.
The belt turning the alternator which is recharging the battery.
Some new alternators will not charge unless the battery has a full charge already.
did you check the alternator??
Inside the alternator
Your battery could need replaced, your alternator or starter could be going bad. It is best to have a mechanic look at it if this bothers you or it continues.
Voltage regulator or loose wire.
Check the battery cables or starter.
Your battery is not charging due to a problem with the battery cables or a bad alternator.
Alternator is not charging. Have it tested and/or replaced.