The correct procedure for installing a new car battery is as follows:
- Disconnect the negative terminal of the old battery.
- Disconnect the positive terminal of the old battery.
- Remove the old battery from the vehicle.
- Install the new battery in the vehicle.
- Connect the positive terminal of the new battery.
- Connect the negative terminal of the new battery.
By following this procedure, you can safely install a new car battery without damaging the battery or the vehicle's electrical system.