Here's why:
* Safety First: Connecting the positive cable first minimizes the risk of sparks. If you accidentally touch the negative terminal with a metal tool while the positive cable is connected, you could create a spark and potentially cause damage or even a fire.
* Preventing Short Circuits: Connecting the negative cable last helps prevent short circuits. If the positive cable is connected and the negative cable is loose, it could touch a grounded metal part of the car, creating a short circuit and damaging electrical components.
Remember this simple rule: Positive first, negative last.
This applies to both installing a new battery and connecting jumper cables when jump starting a car.
