Harang (3-2) limited the Padres to four hits while striking out six and walking none for the Dodgers, who split a two-game series with the Padres.
Adam Kennedy scored twice for Los Angeles, which had lost two straight after winning five in a row.
Edinson Volquez (2-3) took the loss, allowing five runs -- three earned -- on seven hits and three walks over five innings. Volquez struck out six.
San Diego lost for the third time in five games.