smasood Posted May 30, 2012 Share Posted May 30, 2012 MODEL: ES300 YEAR 2001. I recently changed battery after parking it for 4 months & for some insane reason decided to check Alternator. WHen I do testing in cold car, I get ok results 12.5 volt battery before starting and charging current of 14.2 volts after starting the car. (I get 14.6 volts at Terminal B of Generator as testing is recommended in FSM). Also, with blower, AC, Hi-beam running. Now when the car warms up - I start getting low voltage approximately 12.6 to 13.2 volts. An extra 0.5 volts at Terminal B of Generator. Till this time, car is running ok. I have not stopped b/c of dead battery. I also drive may be 3000 miles a year on this car. Any advises if I should change the Alternator. Advance Auto Parts told me that it is a weak alternator - it may go bad anytime. :cries: Quote Link to comment Share on other sites More sharing options...
lenore Posted May 30, 2012 Share Posted May 30, 2012 Frankly that voltage is not out of range....If the battery is depleated than I would expect 13.5 to 14.5 volts with car running.... Quote Link to comment Share on other sites More sharing options...
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