Should the positive or negative terminal be connected first when installing a car battery?

[LaDawson]

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.

[SanJames]

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.

[StMartin]

As a seasoned driver with over 20 years of experience, I still remember my mentor's emphasis during my auto repair training: when installing a battery, always connect the positive terminal first, then the negative. The reasoning is straightforward - connecting the positive first allows current to flow steadily into the system, reducing the risk of sudden discharge. Doing it the opposite way, like connecting the negative first and then touching the positive, will definitely cause sparks to fly everywhere, potentially causing injury. I've avoided several minor accidents by following this rule. For disconnection, the sequence is reversed - remove the negative terminal first before touching the positive, maintaining voltage balance. Always remember to inspect battery terminals and clean connection points before operation to prevent oxidation from affecting conductivity. Safety is no trivial matter - I always have an assistant standing by to ensure everything goes smoothly without errors.

[OJameson]

When I first learned about car maintenance, I was confused about the order of installing the battery. Later, I understood that you should always connect the positive terminal first, then the negative. The reason is that connecting the positive terminal first reduces the risk of short circuits, as the positive terminal carries a higher current and is more prone to causing trouble. The operation is simple: turn off all devices in the car, wear insulated gloves, and proceed step by step. Don’t underestimate this detail—it can keep you safe.