Alternator is defective and needs replacing.
Can be loose or corroded battery connections, loose drive belt, or the alternator is failing.
It's not charging the battery. Check the alternator.
The battery light usually comes on if there is a charging system problem Either battery or alternator are the usual causes.
A few causes that will make the Battery Light come on are: 1. Faulty Battery 2. Loose Battery Connection 3. Battery is not Charging, ie. Faulty Alternator
A failing alternator.
the common cause why the light is on is that your alternator is not working well,try to have your alternator checked .may be the carbon brush is already worn out.
its the alternator if the car is running with a battery light on. but check fuses first
yes if one of the wires was getting an earth from the alternator cover or rubbing off the engine the battery light is really an alternator light warning you that the alternator is not charging the battery
A loose / slipping alternator belt, or the alternator itself is gone bad.
it means your battery isn't charging from the alternator, could be a fault either with the alternator or your aux drive belt maybe snapped is the most likely causes
I'm not sure about all of these, but I have a 98 Taurus and the battery light came on. After a few days, the car died altogether and I had to replace my alternator. I would definitely take the battery indicator seriously and have your alternator checked.
Usually when the battery light comes on its the Alternator, or a bad wire from Alternator to battery, but id check Alternator first.