Question about Lexus ES 300

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Losing battery charge

Battery loses charge after 2 days

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Bad battery

Posted on Dec 07, 2013


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Posted on Jan 02, 2017

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SOURCE: 1991 Dodge Dakota 3.9L new altenator but won't stay charged

Double check all connections are clean & tight. You need to get a voltmeter and have the voltage tested at battery with engine off & running. Drive it to the Napa shop you bought the alternator from if necessary, they should perform test free of charge, as the possibility of a faulty one is not out of the question, provided all is connected properly. Did you check that a main fuse for alternator wasn't blown in Uunderhood power distribution box?

Posted on Feb 11, 2009

  • 1066 Answers

SOURCE: 1994 Jaguar xj6 battery loses all power after

you have a battery power drain.  Remove one fuse at a time until you find which circuit it's in.  This will take a while but it will find the problem and it's free.

Posted on Apr 01, 2009

SOURCE: Charging problem.. Wont charge battery

The instructions for installing a new alternator usually read to fully charge the battery (12.3 - 12.8 volt range). Otherwise, the alternator will be damaged when it initializes. I have seen some extreme damage result from installing a new alternator with a low-charge battery. The torque required to turn an alternator when damaged in this scenario is unbelieveable!

Posted on May 02, 2009

  • 3433 Answers

SOURCE: squealing losing power not chargeing batter changed alternator

Alternator belt squeal? The alternator meets the demands of the battery,or tries its best. If alt. is loading down it's more than likely due to high output. High output could be due to heavy loading of battery or the battery itselfis demanding too much.
Charge rate should be 23.6 to 14.2 volts. at 12v the alternator is pouring out some major amps and won't last very long. Have your battery tested and chk the fluid levels. Cable connections clean and tight? Any off road lighting added? It's not the alternator, YET!

Posted on May 13, 2009

  • 2004 Answers

SOURCE: 2007 Corolla battery not keeping charge

There is an electrical problem. Get someone to scan the vehicle.

You might have to replace the alternator and the battery.


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Posted on May 29, 2009

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