Inside the alternator
It could be an alternator. Check with a mechanic if that is the issue.
Your belt is correctly tensioned?
Bad battery, Parasitic drain.
Try changing the battery.
you have a short where negative is touching the metal of the car or it is grounded inproperly
Try the cables from your battery and alt. Sometimes these can corrode.
You probably have a bad battery. You probably have a bad battery.
Have the battery checked out. It may have a dead cell and not holding a charge,
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. The alternator should have 2 connections.
sounds like your gauge is broken or there is a short in wiring
?ignition control module/pickup
If the light remains on then the system still isn't charging as it should. Check the plug on the alternator and also that the wires to the alt have a good connection.
check alternator belt may be slipping.if the belt isworn or glazed replace it if problems is still there replace alternator.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alt belt.
my 05' cavalier has a bad alternator problem its charging the battery a little bit then stops and the little power my battery has is drained by the end of the night. I replaced the alternator twice and the battery but still no difference.
Have you had the alternator tested? It may not be regulating the energy to the battery, causing it to drain
I have the exact same pproblem with a 1988 tempo, replaced the alternator and battery, still the alternator only reads 5 volts when running. Can't figure it out, do you know of any websites that would have a diagram of the alternator for a tempo?
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.
If the alternator is good then the battery is bad.
go to a auto parts store like advance auto and have them check your computer to see why it is on. they do this for free. this might give you a idea on why its on. if you havent already.
Is the battery/alt warning light on? if they didn't disconnect the battery while the starter was being replaced and they accidently shorted the battery cable out it could have damaged the regulator of the alternator some of the Delphi regulators are very sensitive to that, but if it tested normal at the parts place, does it run down while driving or while sitting?