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Originally Posted by hello
just in case...
red=positve
black=negative
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This is helpful for 99% of the time, but don't rely on colour-coding to determine polarity. You never know what people do, including painting their battery terminals.
Don't even rely on the (+) and (-) markings either, because other parts of the world go backward from the US.
Look at the actual connections coming out of the battery terminals. Usually the hot side has a bunch of accessories drawing power, and the ground terminal goes straight to chassis ground.
Also don't count on the other guy hooking his battery up right either.
The bottom line is you never know how stupid some people can be.