Park a working car close enough for the jumper cables to reach both batteries
Turn off both cars and remove the keys
Put both cars in park or neutral and set the parking brakes
Open both hoods and locate the batteries
Identify the positive and negative battery terminals
Connect one red clamp to the dead battery positive terminal
Connect the other red clamp to the good battery positive terminal
Connect one black clamp to the good battery negative terminal
Connect the other black clamp to an unpainted metal ground on the dead car
Start the working car and let it run for a few minutes
Try starting the dead car
If the dead car starts, keep it running
Remove the cables in reverse order
Drive the started car for at least 15 to 30 minutes