How do you change the alternator on a 1996 Volvo 940?

To change the alternator on a 1996 Volvo 940, first disconnect the negative battery terminal to prevent any electrical shorts. Remove the serpentine belt by loosening the tensioner, then unbolt the alternator from its mount. Disconnect the electrical connections and remove the old alternator, then install the new one by reversing the steps, ensuring all connections are secure and the belt is properly tensioned. Finally, reconnect the battery and check that the alternator is functioning correctly.