Take out your jumper cables, place both vehicles in park or neutral and shut off the ignition in both cars, attach one of the red clips to the positive terminal of your battery, attach the other red clip to the positive terminal of the other car, attach one of the black clips to the negative terminal on the other battery, attach the last black clip to an unpainted metal surface on your car that isn’t near the battery, start the working vehicle and let the engine run for a few minutes, then start your vehicle.