The light is on because the alternator is not putting out the required voltage. Either the belt is broken, loose, or the alternator is defective.
New Alternator BUT Warning Light Still Stays OnMaybe there was nothing wrong with the alternator you replaced, and the problem is somewhere else in the charging system!Although possible, it is highly unlikely that a new alternator would be defective.
The battery light stays on when the alternator is over or under charging. The red brake light stays on when the parking brake is set or the fluid is low. The abs light stays on when the abs computer detects a malfunction and sets a code.
Probably loose drivebelt. or alternator belt of it is seperate.
Is the alternator actually working. It is possible to buy a new alternator that is defective.
did you check the alternator??
The battery light stays on when the alternator is over or under charging.
You hear noises coming from the alternator. The dash light for charging stays on. If not equipped with light might be a guage, in which case you see it not charging.
If the light stays on it indicates your charging system has malfunctioned. Usually this means the alternator has failed, but not always.
Check the alternator.
More than likely the alternator is defective or the belt is loose.
alternator, short in wiring, voltage regulator, computer