“Now the rest of the acts of King Jotham, and all that he did, are they not written in the Book of the Annals of the Kings of Judah? In those days Yahweh began to send King Rezin of Aram and King Pekah son of Remaliah against Judah. King Jotham slept with his ancestors. He was buried with his ancestors in the city of David. His son King Ahaz succeeded him.”
Once again, for more details, see the lost “Book of the Annals of the Kings of Judah.” While King Jotham ruled, the kings of Aram and Israel fought against him. It is difficult to see if they were successful. He died and was buried in Jerusalem. His son King Ahaz took over after him.