
To start, always take extra precautions to be wearing gloves and safety glasses if you have to touch or be near the car battery.
Once both cars are nose-to-nose, it's better to turn off the engine and the car lights too.
Open the hood, put on your safety glasses, and clear off the battery terminals with a small wire brush if you see any corrosion.
Unfold your jumper cables, there will be two black and to red clamps.
Red to positive, good battery then bad battery.
Black to negative, good battery first, then you want to clamp the last…

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