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Does the other car need to be started when jump-starting a vehicle?

2 Answers

MarianaLee

07/28/25 11:49pm

When jump-starting a car, the other vehicle needs to be running. Jump-starting procedure: First, you'll need jumper cables. Connect one end to the positive and negative terminals of the donor car's battery, and the other end to the corresponding terminals of the dead battery - positive to positive, negative to negative. Battery terminals are clearly marked, with the positive usually indicated by a red "+" sign. Jumper cables typically have two wires. Start with the red cable: open the battery cover, firmly attach one clamp to the positive terminal of the dead battery, and the other clamp to the positive terminal of the donor car's battery. Always connect the positive terminals first, then the negative ones - never reverse this order. Also, avoid letting the battery clamps touch anything other than the battery terminals. Battery charging methods: Periodically start your car to recharge the battery. Alternatively, you can disconnect both battery terminals. Important: when removing the positive and negative cables from the terminal posts, always disconnect the negative cable first, or remove the connection between the negative terminal and the car chassis. Then remove the positive terminal (marked with a "+"). Car batteries have a limited lifespan and will eventually need replacement. When installing a new battery, follow the reverse order: connect the positive terminal first, then the negative.

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VanArcher

08/12/25 4:08am

I've been driving for over 20 years and have plenty of experience with jump-starting. When jump-starting, the other car must have its engine running to be effective. I remember once helping a neighbor jump-start his car—he didn't start the engine, and after struggling for a long time, it didn't work, and the battery almost got damaged. With the engine running, the alternator provides a stable current, instantly charging the dead battery to start the car. The steps are: park both cars side by side, keep the donor car running, first connect positive to positive, then negative to a metal frame on the body. After completion, let the dead car run for a while to charge. If the other car isn't running, relying solely on the battery can easily drain it, leading to insufficient current for starting or even causing a short circuit, which is very dangerous. Carrying a portable jump starter is also more convenient.

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