Here’s what you do: Make sure the booster pack is fully charged — otherwise every other step is futile. Connect the red jump lead to your car battery’s positive terminal. Connect the black jump lead to a grounding point. Start the engine. Let the car run for five to ten minutes.

Steps to jump start a car battery Drive the good car up to your car, so the car batteries are as close as possible Attach the red “positive” cable to the good car battery terminal, then attach the other red “positive” cable to your car battery terminal

Connect the red jumper cable to the positive terminal of the dead battery (or jump start terminal on a car with a remote-mounted battery). Connect the opposite end to the positive terminal of the booster battery or jump start terminal. Connect the black jumper cable to the negative terminal of the booster battery or jump start terminal.

Park the car with the good battery nose to nose with the one needing a jump, close enough that the jumper cables will reach. (Note: Most vehicles have their battery in the engine compartment; some have the battery in the trunk.) Turn off the engine in the vehicle with the good battery. Raise the hoods of both vehicles and locate the two batteries.