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Why do you have to remove the negative battery terminal when doing repairs?
Wiki User
∙ 14y ago
This is a safety precaution. Disconnecting the ground cable protects you from accidental shocks, accidental engine starts (by someone unaware of your presence underneath, perhaps), in airbag equipped vehicles it prevents the airbag from deploying accidentally (expensive and/or injurious). Obviously, if the repairs in question require that battery power be available, you wouldn't disconnect it, but the protection it offers is well worth the extra minute it takes to disconnect the cable. As far as why the negative instead of the positive cable is disconnected, the reason is that if you are touching the positive cable and anywhere else on the vehicle, you'll get shocked. Not so, with the negative cable. Also, the negative cable seems less prone to sparking than the positive cable. If, however, you are working on a vehicle with positive ground (uncommon in North America), the positive (ground) cable is to be disconnected
Wiki User
∙ 14y ago
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Is it right to remove the positive terminal ahead of the negative terminal?
No, you should remove the negative first. That way if your wrench slips and hits a metal part of the car and the battery at the same time it will not spark.No, you should remove the negative first. That way if your wrench slips and hits a metal part of the car and the battery at the same time it will not spark.
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