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When at idle the volt meter drops to about 15, but when increased rpm it shows a

(2001 Toyota Sequoia)
in Cordova, AL on December 27, 2013
on my 2001 toyota sequoia when at idle the volt meter drops to about 15, but when rpms increase it goes back to almost 18, if u turn off engine and if lights are left on( or radio for that matter) ignition in acc position the batt. will not start the engine only click. the car does not have to be in this position long. So do i have a bad batt. or is the alternator going out. HELP
Displaying 3 answers & 2 comments
Popular Answer
Sounds like the Alternator is over charging your battery, the voltage regulator inside is not keeping the voltage at the correct voltage. It may have already damaged your battery as well, take it to your local parts store like Advance, AutoZone, O'Reilly, they will test both parts for you free of charge.
of G. T. Service Center on December 28, 2013
Just a comment, but in many cases the alternator will act that way when it's trying to charge a bad battery, still needs to be tested, but who am I.
on December 28, 2013
you're ProfessorG........ and the alt & bat should both be tested ...........as has been stated.
of G. T. Service Center on December 28, 2013
Agreed as stated ????
of Gillespie's Auto Service on December 28, 2013
Don't trust the voltmeter on the car alone. Get a real meter on it and see what is going on. Your truck should be charging between 13.9v and 14.7v at idle and at 2000 rpm.
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