Question about 1996 Subaru SVX

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'96 SVX Battery death

After two alternators and one knock sensor replaced in the last 3-4 months, my battery has started to give me some problems. I'm not a car guru, but I realize the correlation between the alternator and battery.. Scenario: Battery dies. Charged battery overnight using AC-powered charger. Car runs the next day, but battery is dead by the following morning. Charged again, and the car runs (for now) but now I'm worried about the source of the problem. With the economy being what it is, I'm already down to no insurance and barely holding on to my car, and I would love to keep it if I can diagnose this problem. - Please Help Me in Seattle

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  • phil_fountai Dec 10, 2008

    Thanks Erik, I'm going to follow your thread to the letter and get back to you. Much appreciated. - phil

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First off charging systems ****, but they are simple, the battery has been overworked most likely, when the alternator craps out then the car is only running on the battery, the battery is only normally used to kick the starter over then the alternator takes over, so when the battery is discharged then manually recharged then discharged, on and on it creates an overworked environment. pull the battery and have an autoparts store check it for free, if it tests good than move to the altornator when the car is running the battery should read 14-14.5 volts since the altornator is charging it. if this is not the case you need another alternator, if you battery is dieing from sitting, you have a parisidic drain which means that something in your cars system is not turning off and draining your battery while it sits, to test for this take your negitive cable off and check amperage between neg bat cable and negative post if your amps are more than a couple miliamps with the doors shut all electric (interior lights, ect.) are off then you need to start pulling fuses till the amperage goes down, when that happens then you know what system area you have the short in, then work from there with what ever componants are ran with that fuse. if you have any questions just let me know erik-Mcdonald@student.kirkwood.edu

Erik
U.S. Army

Posted on Dec 10, 2008

  • erik mcdonald
    erik mcdonald Dec 11, 2008

    hey no problem buddy, ill keep my eye out for your results, good luck bud, shoot me an email i can help ya over the phone if needed, take care

    Erik
    U.S. Army


  • erik mcdonald
    erik mcdonald Dec 11, 2008

    and just a heads up ive replaced alternators and the next week the car comes back doing the same thing, the thing is most autoparts stores rebuild their altornators and the bearings will go bad or not even work in the first place when you get them from the store, ive had to replace a altornator 3 times due to manufacturer defects and it can be a pain sometimes you should be underwarrenty if that is the case though. good luck

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Posted on Jan 02, 2017

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