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 alt. You may also have a battery drain (something that is staying on and killing the battery)
1. Alternator charging system malfunction.. [not charging enough]
The diode in the alternator is probley going bad, Check charging system. And replace alternator.
If the battery checks out okay, you can replace just the voltage regulator inside the alternator.
Battery is not charging due to defective alternator or the battery itself needs to be replace.
If the alternator is not charging the battery, then it will eventually go dead If the voltage regulator (in the alternator) is defective it will eventually kill the battery Check the alternator with a voltmeter A fully charged battery (without engine running) should read approx. 12.8 volts With engine running should read 13.8-14.2 volts
The battery is not charging, probably because the alternator has no output. Exchange alternators are readily available but not cheap. Check alternator belt tension. Remove, inspect and replace alternator carbon brush pack as necessary. After that, if still not charging, swop out the regulator.
If your battery was dead and you jumped it to get it started and the gauge shows your not charging you need to replace the alternator.
My lights were coming on when my alternator was going out. Test your alternator and charging system and replace accordingly.
Alternator is not charging, or if it is the charge is not getting to the battery
Sounds like the alternator is not charging the battery up / WORKING check charging system. Charge battery to 12.8 volts and then start engine and hook volt meter to battery and it should read 13.8 to 14.3 volts. If it don't then replace alternator. Also need to make sure the alternator belt is tight.
alternator needs to be replaced. battery also might be a problem due to the alternator not charging it
charging system not charging battery with new batttery, alternator and fuel pump. what will make that happen ?