Jump Starting the Vehicle - Jump Starting the Vehicle

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Jump Starting the Vehicle

Connecting the Jumper Cables

WARNING: Do not connect the negative jumper cable to any other part of your vehicle. Use the ground point.

Note: If you are using a jump pack or booster box, follow the manufacturer's instructions.

Pull the red plastic boot backward. Connect the positive (+) jumper cable to the positive (+) terminal of the discharged battery.

Connect the other end of the positive (+) jumper cable to the positive (+) terminal of the booster vehicle battery.

Connect the negative (-) jumper cable to the negative (-) terminal of the booster vehicle battery.

Make the final connection of the negative (-) jumper cable to an exposed metal part of the disabled vehicle's engine, as shown in the following illustration, away from the battery and fuel injection system, or connect the negative (-) jumper cable to a ground connection point if available.

Starting the Engine

Start the engine of the booster vehicle and moderately rev the engine, or gently press the accelerator to keep the engine speed between 2000 and 3000 RPM, as shown in your tachometer.

Start the engine of the disabled vehicle.

Once you start the disabled vehicle, run both vehicle engines for an additional three minutes before disconnecting the jumper cables.

Removing the Jumper Cables

Remove the jumper cables in the reverse order that they were connected.

Note: Do not switch the headlamps on when disconnecting the cables. The peak voltage could blow the bulbs.

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2021 Bronco Owner's Manual