There are times when the alternator will test out fine as far as amp output and voltage output but if your alternator has a weak diode(s) it may trigger the light to go on. I hate to say you should replace the alternator, but your charging system is pretty much self contained in your alternator so I believe the problem is in fact in your alternator. Good luck.
check fan belt is not broken or loose and check alternator
Usually when the battery light comes on its the Alternator, or a bad wire from Alternator to battery, but id check Alternator first.
There should be a plug on the side of the transfer case about half way up the side. Take the plug out. If oil comes out... it's full!
You possibly have a loose alternator belt or the alternator is weak. Check the voltage at the battery with the engine running. It should be 13.5 ? 16 volts. Any less and the alternator is weak and needs replacing. Also make sure the connections at the battery are clean and tight.
most likely its your alternator that's not charging your battery like it should causing it to turn on and off. A good way to check that is by going to your local auto zone and asking them to check your alternator to see if it creating a high enough charge.
The check gauges light comes on when one of the gauges is out of its safe range. It could be the alternator over or under charging, oil pressure low, or the engine overheating.The check gauges light comes on when one of the gauges is out of its safe range. It could be the alternator over or under charging, oil pressure low, or the engine overheating.
Voltage regulator is in computer. Check Alternator, then check computer
i dont know about the oil and brake ...but brake and battery light comes on you should check the alternator for proper charge
have an alternator, battery, and electrical check to find out what the problem is. battery may not be taking a charge, or the alternator is not putting out enough voltage.
Change your alternator
Generally a rebuilt one comes with a lifetime warranty, so if you are doing the work yourself, feel free. It won't go out.
alternator, or a wire to alternator loose