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The battery light stays on when the alternator is over or under charging.
your alternator is not charging your battery..u need to get a new alternator
Battery and brake light coming on means the Alternator is not charging the battery . It could either mean a bad circuit connection or the alternator is just shot. Have the Alternator checked.
that light usually means that the battery is going bad or that your alternator isn't charging anymore
I can tell you that on a 2000 mercury cougar it is a fuse on the positive cable between the battery and the alternator
The battery light comes on when the alternator is either over or under charging. If the alternator tested good you have a wiring or computer problem. The engine computer is the voltage regulator.
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The alternator is probably over-charging the battery. Replace the alternator if the voltage at the battery terminals is over 15V when the engine is running.
A loose / slipping alternator belt, or the alternator itself is gone bad.
It stops charging the battery and the charging system light comes on. Drive to the nearest auto parts store and they will check the system for free.
Non functioning charging system. Possibly defective battery, alternator, of belt slipping or broken.
The charging system is the alternator which is on and functioning anytime the engine is running. If not, then you have a problem with the alternator.