2000 Toyota Tundra Battery Light On But Alternator Is Charging

This would make the Battery Light come on.

2000 toyota tundra battery light on but alternator is charging. The idea is that when you turn on the key voltage flows through the light to the S terminal on the alternator. When I went to go purchase a new one from. It should be greater than 13 volts less than 15V.

Go through the basics. The battery stores enough voltage to be able to start the engine without the assistance of an alternator. 2000 Toyota Tundra SR5 4x4 with 47L V8.

At this point my best guess is a battery cable but Im really at a loss. If it is running and the alternator is charging then a diode inside the alternator is the likely culprit. 2 Make sure the regulator is being excited.

I have a full charge on the battery and have cleaned the corroded terminals hoping this was the problem. As this warning may be triggered by a number of things it is important to take steps to ensure that you know what the actual issue is before replacing any parts. This light illuminates whenever the charging system does not charge the battery with a voltage above approximately 135 volts.

This is the same connector that lets the on-board computer know if the alternator is charging or not which is what the battery light actually means. A new alternator will rectify the problem. Charging voltage not verified.

If you see your Tundras battery light turns on while the engine is already running that is a strong indication that the alternator is no longer providing enough wattage to power the various electrical systems and charge the battery at the same time. With the battery warning light off standard charging current as measured at the alternator B wire should be 10 amps or less and charging voltage should range between 132 to 148 volts. You can use a volt meter to test what the battery is receiving by connecting it to the middle of the posts while the engine is running.