How do you replace the alternator on a 1994 Nissan Sentra?

First, disconnect the battery cables, Second, you have to drain some or all the coolant so you can remove the upper radiator hose, Third, disconnect the alternator cables, Fourth, loosen the bolt attaching the alternator so you can loosen the alternator belt, Finally, remove the bolt and angle the alternator to remove it. You might need to hammer the alternator from underneath, sometimes they are really tight. 'Hope this helps.