How do you jump start a car using a citroen xsara Picasso?

To jump-start a Citroën Xsara Picasso, first ensure both cars are turned off. Connect the red positive jumper cable to the positive terminal of the dead battery, then attach the other end to the positive terminal of the working battery. Next, connect the black negative cable to the negative terminal of the working battery and the other end to an unpainted metal surface on the engine block of the dead car. Start the working car, let it run for a few minutes, and then try starting the Xsara Picasso.