GET GROUNDED!
2. Connect one of the BLACK cables and connect it to the NEGATIVE
terminal (-) of the GOOD battery. Create a GROUND
by connecting the remaining BLACK cable to an unpainted metal part of the car with the DEAD battery, such as the engine block on the side away from the battery.
START YOUR ENGINES!
3. Start the engine of the car with the GOOD
battery. Next, turn the ignition of the car with the DEAD battery.
If it starts, DO NOT TURN THE ENGINE OFF. Remove the
jumper cables .