2000 Toyota Tundra Battery Light On But Alternator Is Charging

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.

2000 toyota tundra battery light on but alternator is charging. 2 Make sure the regulator is being excited. It should be greater than 13 volts less than 15V. The alternator cannot bring a very weak or dead battery back to life.

Oct 27 2017. 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. 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.

A weak battery or working charging circuit wont turn on the battery light. At this point my best guess is a battery cable but Im really at a loss. If you are feeling generous.

A new alternator will rectify the problem. Check your voltages again with the engine stopped and then running. Toyota Tundra Bad Alternator Diagnosis.

2000 Toyota Tundra SR5 4x4 with 47L V8. The battery light goes off when the alternator. It should be greater than 13 volts less than 15V.

Discussion Starter 14 Jun 24 2014. 17 DCSB V6 2wd Sr5. If you have a 2007-2012 Toyota Tundra or Sequoia with a nolow charging condition even after you have replaced the battery and alternator you will want to check the engine idle and clean the throttle body if needed.