How do you replace the alternator in a 1999 ford contour?

To replace the alternator in a 1999 Ford Contour, first disconnect the negative battery terminal for safety. Remove the serpentine belt by using a wrench to relieve tension on the belt tensioner. Next, unbolt the alternator from its mounting bracket and disconnect the electrical connections. Finally, install the new alternator, reconnect the electrical wires, reattach the belt, and reconnect the battery terminal.