Question about 2000 Subaru Forester

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Battery draining completely within 15 miles of driving

Recently the battery in our Subaru Legacy started draining all of its juice for no apparent reason. The first time it happened, I assumed that the battery was old and wouldn't hold a charge anymore. I bought a brand new battery which started and ran the car. However after I drove the car for about 15 miles, that batter went dead as well.

When it comes to automotive problems, I am fairly mechanically inclined but as soon as you add an ellectrical problem to the mix, I become progressively dumb and dumber.

Frustrated and getting more so, can anyone help

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  • Mike Butler
    Mike Butler May 11, 2010

    Simple. Obtain a 12 volt test light from autoparts store or hardware store if needed. (less than $10). Remove positive (+) cable from battery, now take your test light and use whatever to connect it between that battery cable end, and your battery (+) post. It should light up, because there is a current draw. (Be sure it is away from any bare metal sources that could touch stem of light or cable end.) Your stereo will automatically cause a small draw for one, as memory feature causes that. Now as you start pulling fuses in your fuse panel one at-a-time, with needlenose pliers or whatever works for you, watch the test light for dimming, or going out. The ones that do cause a dimming, mark down where you took it from, and what size amperage it is, and leave it out for now. When you pull the one causing all your headaches, you've found the circuit causing the problem & then we can go from there if it isn't obvious what the problem will be. If you decide to try it, get back to me if you have any questions.

  • Jay Glendenning
    Jay Glendenning May 11, 2010

    Have you checked the alternator, the drive belt tension?

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I had the same problem on my NEW Forester, dealer told me to check the litttle switch set far down on the top of the steering column. I had accidently turned it on while cleaning the car. It turns on some tiny lights that are used more in Japan and not easily noticed unless you are looking for them. Sure enough, that is what caused my battery to drain multiple times.

Not sure if it helps but it's worth checking just in case.

Posted on Aug 20, 2009

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