Question about Hummer H2

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Batterie trouble - H2 Hummer Cars & Trucks

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  • tigressegris Sep 03, 2008

    my batterie on my hummer h2 2003 is loosing is charge if hy dont ride de véhicule for tree days.end hy have a new batterie

  • Jeremy Dellow
    Jeremy Dellow May 11, 2010

    You need to give much more information than this for us to be able to help - as much info as you can.

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You have an electrical short somewhere in the car, and it's what is draining the battery. Put a lightbulb inline with the battery (between the battery and the negative cable). You should see it light up. Get your fusebox diagram out and remove the fuse for the radio and any security system (since power always runs through these). Then remove each fuse one by one, and watch the bulb. When you pull a fuse, if the bulb stays lit, that's not the one you want. Put it back and pull the next one. When you pull a fuse and the bulb goes out, you've found the circuit that is conducting and causing your battery drain. From there, you have to troubleshoot the circuit to find out which component is failing.

Posted on Oct 12, 2008

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