How do you change an alternator on 1990 Toyota pick up?

To change the alternator on a 1990 Toyota pickup, first disconnect the negative battery cable to ensure safety. Remove the drive belt by loosening the tensioner and then unbolt the alternator from its mounting brackets. Carefully disconnect the electrical connectors and the positive battery cable from the alternator, then take out the old alternator. Install the new alternator by reversing the steps, ensuring all connections are secure and the drive belt is properly tensioned before reconnecting the battery.