2000 Toyota Tundra Battery Light On But Alternator Is Charging

Check if this fits your 2000 Toyota Tundra.

2000 toyota tundra battery light on but alternator is charging. It should be greater than 13 volts less than 15V. 2000 Toyota Tundra. This light illuminates whenever the charging system does not charge the battery with a voltage above approximately 135 volts.

A new alternator will rectify the problem. Oct 27 2017. 17 DCSB V6 2wd Sr5.

I have a full charge on the battery and have cleaned the corroded terminals hoping this was the problem. The battery is fine it has no trouble starting or holding a charge. The battery stores enough voltage to be able to start the engine without the assistance of an alternator.

Check your voltages again with the engine stopped and then running. 1 Make sure the alternator is charging operating properly by measuring the voltage between earth battery negative and the live terminal. 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.

IIRC there are 2 fuses for the alternator will check my diagram later. Take the 12-14mm nut off the positive post and clean in between ALL the stacked leads on there. Start truck use jumper cables or use scrap wire to connect alternator directly from alternator positive out to battery positive.

Toyota Tundra Bad Alternator Diagnosis. Simply charge the battery and restart the vehicle to troubleshoot whether the issue is the alternator or the battery. Whenever the brushes on the inside of the alternator are starting to go or the voltage regulator is starting to fail the charge light will start flickeringflashing in a somewhat regular pattern.