Q:

How do you jump-start a car?

A:

Quick Answer

To jump-start a car, apply jumper cables to the car's dead battery and the live battery of another car. Run the engine of the car with the live battery for a few minutes, then turn the key in the ignition of the car with the dead battery.

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Full Answer

  1. Clean the connections of the batteries

    Clean the connections of the dead battery with a wire brush.

  2. Apply jumper cables to both batteries

    Positioning the car with the live battery where jumper cables can reach both batteries, apply the positive cables to the positive connections on each battery. The positive connections of the batteries and cables are marked by the "+" sign and usually are colored in red. Then apply the negative cable to the negative connection of the live battery. The negative connections are marked by the "-" sign and usually are colored in black. Do not apply the negative cable to the dead battery, but attach it to a section of unpainted metal on the car.

  3. Start running the engine of the live car

    Turn the key in the ignition of the car with the live battery, and allow the engine to run for a few minutes.

  4. Turn the ignition of the car with the dead battery

    After running the engine of the car with a live battery for a few minutes, turn the key in the ignition of the car with the dead battery. Run the car's engine for several minutes. Otherwise the engine may lose its charge again.

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