When disconnecting a battery, you should always disconnect the negative terminal first. The negative terminal is usually marked with a minus sign (-) and often has a black cover or cable. Disconnecting the negative terminal first is important for safety reasons because it cuts off the battery's connection to the car's electrical system, reducing the risk of electrical short circuits or sparks. After removing the negative terminal, you can then disconnect the positive terminal, which is usually marked with a plus sign (+) and often has a red cover or cable. In summary:
- Disconnect the negative terminal first (usually black or marked with "-").
- Then disconnect the positive terminal (usually red or marked with "+").
This method helps prevent accidental short circuits or sparks while working on the battery.
