ES - 1st to 4th Gen (1990-2006) Forum for all 1990 - 2006 ES300 and ES330 models. ES250 topics go here as well.

Help with alternator not charging at idle

Thread Tools
 
Search this Thread
 
Old 07-18-24, 08:26 AM
  #1  
DrPepPep
1st Gear
Thread Starter
 
DrPepPep's Avatar
 
Join Date: Jul 2024
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default 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
Old 07-18-24, 02:35 PM
  #2  
Oro
Pole Position
 
Oro's Avatar
 
Join Date: Dec 2013
Location: wa
Posts: 2,211
Received 438 Likes on 383 Posts
Default

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.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
nlowin
ES - 1st to 4th Gen (1990-2006)
5
10-02-23 10:31 AM
Is200tnc
IS - 3rd Gen (2014-present)
7
01-04-20 09:28 PM
RaynArt
Performance & Maintenance
9
01-08-07 10:33 AM
Jmai22
Maintenance
1
05-16-02 10:44 PM



Quick Reply: Help with alternator not charging at idle



All times are GMT -7. The time now is 10:16 AM.