A »To safely jump-start a vehicle, connect the red clamp to the dead battery's positive terminal, then the other red to the booster battery's positive. Connect the black clamp to the booster battery's negative terminal, and the other black to a metal part of the dead car away from the battery. Start the booster car, then the dead car. Once running, disconnect in reverse order. Always wear safety gear and follow manufacturer instructions.

A »To jump-start a vehicle safely, ensure both vehicles are parked on level ground with engines off. Connect the positive (red) jumper cable to the dead battery's positive terminal, then to the good battery's positive terminal. Connect the negative (black) cable to the good battery's negative terminal, then to a metal surface on the dead vehicle's engine or frame. Start the working vehicle's engine, then the dead vehicle's engine.