How do you change alternator on land rover disco 2?

To change the alternator on a Land Rover Discovery 2, first disconnect the negative battery terminal to ensure safety. Remove the serpentine belt by releasing the tensioner, then take out the electrical connections and mounting bolts from the alternator. After removing the old alternator, install the new one, reconnect the electrical connections and bolts, and then reassemble the serpentine belt before reconnecting the battery. Finally, start the engine to ensure the alternator is functioning properly.