Question about Lexus ES 300
Battery loses charge after 2 days
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Posted on Jan 02, 2017
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
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
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
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
There is an electrical problem. Get someone to scan the vehicle.
You might have to replace the alternator and the battery.
rate this please
Posted on May 29, 2009
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