The Hebrew Bible says simply that Haran died before his father Terah in the land of his birth (Genesis 11:28). One quiet sentence. Targum Pseudo-Jonathan opens that sentence like a scroll and reveals the entire legend hidden beneath it.
Nimrod, the tyrant king of the Chaldees, has heard that young Abram will not worship his idol. So Nimrod builds a furnace of fire and throws Abram into it. And the fire — the Targum tells us in a single line that eclipses whole chapters of plain Scripture — had no power to burn him.
Now comes the sentence most interpreters would rather skip. Haran, Abram's own brother, watches his brother step unharmed from the flames, and his heart becomes doubtful. He calculates. If Nimrod wins, I will stand with Nimrod. If Abram wins, I will stand with Abram. Haran will not choose until the outcome is clear.
The bystanders see Abram survive and explain it away: Haran must be a sorcerer, he must have spelled the fire. And then — min yad, out of hand, immediately — fire falls from the high heavens and consumes Haran alone. He dies in front of Terah his father, in the furnace that was built for his brother.
The Targumist's verdict is merciless and kind at once. The man who will not choose is not saved by neutrality; he is exposed by it. Faith, in this reading, is not certainty about God — faith is the willingness to take a side before you know who is winning. Haran waited for heaven to show its cards. The cards burned him.