What is the correct sequence for jump-starting a car battery?
2 Answers
The correct sequence for jump-starting a car battery is to first connect the positive terminal, followed by the negative terminal. The functions of a car battery are: 1. To provide power to the starting system, ignition system, and electronic fuel injection system when starting the engine; 2. To supply power to the vehicle's electrical equipment when the engine is off or idling at low speed; 3. To assist in powering electrical devices when the generator's output is insufficient; 4. To mitigate voltage surges in the electrical system and protect the vehicle's electronic components; 5. To store excess electricity generated by the alternator. Precautions for using a car battery: 1. Regularly check the electrolyte level and top up immediately when it falls below the minimum mark; 2. Keep the battery away from open flames; 3. Read the battery's instruction label carefully when charging; 4. Avoid direct contact with battery electrolyte as it is corrosive to eyes and skin; 5. Perform regular maintenance and care for the battery.
I've encountered jump-starting a car battery several times, and the sequence is absolutely crucial—don't mess it up. First, clamp the red jumper cable onto the positive terminal of the dead battery, that’s the one marked with a plus sign. Then, attach the other end of the red cable to the positive terminal of the booster battery. Next, clamp the black cable onto the negative terminal of the booster battery. Don’t rush to connect it to the dead battery’s negative terminal—instead, attach the other end of the black clamp to a clean, unpainted metal surface like the engine block. Don’t skip this step—connecting directly to the negative terminal can cause sparks and even an explosion. After that, start the booster car and let its engine run for a few minutes before attempting to start the dead car. When removing the cables, reverse the order. I always recommend checking the battery for leaks or cracks before starting, especially in humid weather, and wearing gloves and goggles just in case. Getting the sequence wrong can lead to a short circuit or battery damage—take your time, safety first.
