What is the correct order for installing car battery terminals?
3 Answers
When installing a car battery, the correct order is to connect the positive terminal first, followed by the negative terminal. Below is relevant information about fault codes: Background knowledge: Standard tire pressure varies across different vehicles. For compact cars, this pressure typically ranges between 30-40 psi. After troubleshooting car issues, it's generally necessary to clear the fault codes. When clearing fault codes, strictly follow the prescribed method for the specific vehicle model. Never arbitrarily remove the negative battery cable to clear fault codes. Two common abnormal situations: 1. May cause certain vehicle models' control computers to lose "experience memory." 2. Some vehicle models' control computers feature automatic memory functions; removing the negative battery cable will erase engine operation data stored in RAM.
The sequence of connecting the positive and negative terminals of a car battery is something I always keep in mind before working on it: always connect the positive terminal first, followed by the negative. This principle isn’t arbitrary—the car frame acts as the negative terminal. If you connect the negative first and then the positive, the wrench in your hand could accidentally touch both the frame and the positive terminal, causing an immediate short circuit and fire, with serious consequences. I once witnessed this firsthand when a neighbor neglected this rule while replacing their battery—sparks flew everywhere, nearly setting the car on fire. The removal sequence is the opposite: disconnect the negative terminal first, then the positive, to ensure safety. Before installation, I recommend checking the battery’s condition—such as stable voltage and corrosion-free terminals—and using insulated tools for the safest operation. If you’re a beginner and unsure, it’s best to leave it to a professional repair shop rather than risk major damage for a small task. Overall, safety comes first, and developing good habits can extend your battery’s lifespan.
Last time I replaced the battery myself, I almost made a big mistake by getting the sequence wrong at first, but thankfully corrected it in time. I'm used to connecting the positive terminal first since it's linked to the electrical system, then attaching the negative ground. Otherwise, tools touching the car body could cause a short circuit - overheating and ruining the battery would be the least concern, safety issues are what really matter. Now for every operation, I always disconnect the old battery power in advance and wear insulated gloves throughout. From personal experience, this installation sequence not only prevents accidents but also ensures smooth startup. Additionally, battery maintenance is crucial - cleaning terminal corrosion or applying anti-corrosion spray can save a lot of trouble. Reading the manual before starting is the smart choice, don't be reckless like I was initially.
