Help with alternator not charging at idle
07-18-24, 08:26 AM
#1
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Help with alternator not charging at idle
Looking for help. I have put 5 new alternators and 6 new batteries in my 2001 ES 300. I have also replaced the connection and ruled out a parasitic draw. The alternator WILL charge when idling without loads on but WILL NOT charge when loads are on. So if I pull up to a stop light with my lights and AC on, I start to lose power and everything goes dim. Toyota could not figure it out or another shop that specializes in electrical issues. Please help
07-18-24, 02:35 PM
#2
Pole Position
Where are you getting the alternators? I went through four (?)alternators in a few years from O’Reillys until I went and go another proper Denso rebuild at NAPA.
If an alternator isn’t making the required Voltage, that’s an alternator issues. It’s a stand-alone component free of any computer control on that car. You can measure the Voltage across the alternator’s output terminals and confirm that.
If an alternator isn’t making the required Voltage, that’s an alternator issues. It’s a stand-alone component free of any computer control on that car. You can measure the Voltage across the alternator’s output terminals and confirm that.
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