Is it better to disconnect the positive or negative cable to a car battery?

I am trying to keep my battery from dying overnight since i need a new door jamb switch b/c my interior lights will not go off.

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  • 1 decade ago
    Favorite Answer

    Two ways to solve the problem:

    Locate & remove the fuse... However that fuse is most likely to provide power to other components so not such a good idea.

    OR...

    Pop the switch out of the door frame & remove the negative wire from the switch. (usually "black" ) Wrap some electical tape around the terminal on the end of the wire & put the switch back in place. Problem solved!!!

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  • wayne
    Lv 5
    1 decade ago

    Always the negative, but make sure its free from any part of the body where you sit it. and the reason why its always the negative is because when removeing it and refitting it , it will not create a spark, like from the positive side, and can cause your battery to explode, if any battery gaz is around, most important. its a known fact that all qualified mechanics know.

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  • Anonymous
    1 decade ago

    Just answering the first question.

    Always- disconnect- the(negative) cable first no if ans or butts.

    For no reason should the positive cable EVER be disconnected first.

    Nor should it be connected last EVER.

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  • 1 decade ago

    disconnect the positive, the negative is used as a ground for most electrical components. By removing the negative and not the positive you are sending power to parts that have no ground!!! - PL

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  • 1 decade ago

    Temporary remove the interior bulbs, or remove the positive cable

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  • 1 decade ago

    instead why not just pull the fuse out for the interior lights?...positive lead disconnected battery will not drain

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  • The negative [[the black one]]

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  • Anonymous
    1 decade ago

    negative... so you dont get sparked haha

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