New alternator battery light back on

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It will charge battery when driven for a while is it alternator again

to grow in Winchester OH

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May 1, 2015

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1 Reply

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stevieray1on May 1, 2015

maybe bad new alternator?maybe bad battery?maybe connections corroded. the battery is for starting the car.then the alternator takes over.it does not charge the battery.it maintains the charge on the battery.with car off,the battery should read 12.6 volts.with car running battery voltage should be 13.5-14.5 volts.have charging system checked.

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to growon May 1, 2015

My brother in law said if u pull the pos. Red wire off the battery the alternator should keep car running is this true car stops running

stevieray1on May 1, 2015

DO NOT DO THAT.DO NOT!!!!YOU CAN NOT DO THAT ON THESE NEWER COMPUTERIZED CARS NOW!!!IF IT WAS A 1975 CHEVY,YES.BUT DO NOT DO NOT DO THAT.YOU WILL HAVE A BAD YEAR IF YOU DO.DO NOT REMOVE BATTERY CABLES WHILE VEHICLE IS RUNNING!!!

2004buickon Jan 20, 2016

What happens if u do disconnect them while vehicle is running?

stevieray1on Jan 20, 2016

very possible voltage spike and could/will fry some things,including the computer.most newer years vehicles are computer controlled alternators now,no voltage regulator integral to the alternator anymore.not this one but newer.

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