What is the first step to take when replacing a battery?

When replacing a battery, the first step is to disconnect the negative terminal. This is crucial for safety reasons. By disconnecting the negative terminal first, you reduce the risk of a short circuit. If you were to disconnect the positive terminal first and accidentally touch any grounded metal part of the vehicle or battery, it could lead to a spark or arc, potentially causing injury or damaging the battery or vehicle electronics. Disconnecting the negative terminal eliminates the path for electricity to flow, making it safer to work with the positive terminal afterward.

Additionally, while checking the battery charge or removing the hold-down could be part of the overall procedure, these actions should not precede the disconnection of the negative terminal when replacing a battery. Prioritizing the disconnection of the negative terminal helps ensure a safe and effective battery replacement process.