Should the positive or negative terminal be connected first when installing a car battery?
2 Answers
When installing a car battery, connect the positive terminal first followed by the negative terminal. When removing, disconnect the negative terminal first and then the positive terminal. Incorrect operation can lead to serious consequences. Reason: The car itself is a negatively charged system. If the negative terminal is connected first, it may cause a short circuit in the car's equipment. By connecting the positive terminal first and securing it properly, even if the negative terminal of the battery comes into contact with the car's negative parts, it won't cause a short circuit, effectively protecting the vehicle and extending its service life. Battery installation steps: 1. Place the new battery in the corresponding battery tray, aligning the positions of the positive and negative terminals; 2. First attach the positive terminal clamp, then attach the negative terminal clamp; 3. Confirm that the connections are correct and close the engine hood.
As a DIY car enthusiast who frequently works on my own vehicle, I place great emphasis on safety. When installing a battery, always connect the positive terminal first, followed by the negative terminal. This is because if you connect the negative terminal first, your tools or fingers may accidentally touch the battery's positive terminal or other metal components in the engine bay, potentially causing a short circuit that could spark or deliver an electric shock—which is extremely dangerous. I once witnessed a friend nearly cause a short circuit, and it was quite a scare. Simply put, the positive terminal is the high-voltage entry point, and premature contact with the negative terminal can easily create a circuit loop. After remembering this sequence, ensure the battery is securely installed to avoid vibrations and corrosion, which can also extend the battery's lifespan. In short, safety comes first—always wear insulated gloves and goggles, confirm all electrical systems are turned off before starting, and never skip steps for convenience.
