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car-repair/how-to-tell-if-you-have-a-faulty-alternator - CarsDirect


How to Tell if Your Alternator Has Gone Bad A dead alternator can cause all kinds of ... Car Battery Drain, Dead Overnight Understanding Why Your Battery Dies.

www.ask.com/youtube?q=Does a Bad Car Battery Drain Your Alternator?&v=2x0o4-bNCvY
Jun 26, 2014 ... Have you performed a parasitic drain test with every possible fuse removed yet ... to keep voltage from draining from the battery when the car is off. ... This is a great case study of a bad diode rectifier. ... How to Perform a Parasitic Draw Test on Your Vehicle - Diagnosing Battery Drain Issues - Duration: 7:54.

The Top 5 Things That Will Drain Your Battery | Advice from ...


Nov 30, 2015 ... If your lights, radio, and other things are running off your alternator, your car battery ... And even then, bad charging will drain your car's battery.

Can Alternator Cause Battery Drain? | Yahoo Answers


Feb 25, 2007 ... Overnight the voltage of my car battery drops from 12.4 to 11.8 and if I ... of your drain but The alternator can cause a drain due to bad diodes.

How to Find and Stop Car Battery Drains – DIY ... - Popular Mechanics


Jun 7, 2010 ... There are plenty of energy-robbing devices on your car that are supposed to ... running, and a charging-system voltage test confirms that your alternator is charging. ... Some vehicles will show as little as 10 mA residual drain.

Diagnosing A Car Battery That Runs Down


Why Your Car Battery Runs Down. ... KEY-OFF CAR BATTERY DRAIN. If your car .... Sometimes a bad alternator diode can cause a car battery to run down.

How does a bad alternator drain a battery? - Quora


Sep 7, 2015 ... It is highly unlikely for the alternator to drain the battery. ... Which Android Apps are known to contain malware or bad code that drains your battery? ... Does an alternator recharge a car battery at a positive rate when an engine ...

[cars] Battery keeps dying can't figure out why. - Penny Arcade


The battery in my Blazer keeps getting drained and dying. ... things on in the car until your voltage drops so you can figure out what's killing you. ... Best case, he replaced your alternator with one that's already bad by accident.

Can an Alternator Drain a Battery? - eHow


... the car's battery. In some cases, however, the alternator can actually drain the battery, causing significant problems. ... Recharging a car battery won't help if the car has a faulty alternator. battery ... How to Check a Battery Drain on Your Car.

Five Signs Your Car Battery Is Dead (or About To Die) | AxleAddict


Jan 23, 2016 ... Your ordinary battery doesn't do so well in extremely cold weather, which ... the cable, then let your car run for 30 minutes so that your alternator can charge ... alarm, and all other components that might be draining your battery in secret. .... Signs and symptoms of a bad heater core in your car: fog, drips, and...

More Info

Can a dead alternator drain a brand-new battery with a day or two ...


Your FIL is correct the alternator is the most likely culprit. ... If the alternator is dead, but the battery is fully charged, the car can and does use .... If the alternator is bad, then everything electrical is running off the battery and it ...

Can my alternator drain my battery if the car isnt running ...


Jul 26, 2008 ... Best Answer: Shouldn't, no, not saying it can't. But your car is running off the battery if the alternator is bad. Most likely you're draining the ...

Will bad alternator diode cause parasitic drain and still charge ...


Will bad alternator diode cause parasitic drain and still charge battery? ... The battery was 7 years old so I figured it was toast when my car failed ... It sounds like a bad alternator to me, it's possible that your old battery was fine ...