Lighted down off his chariot - Probably his chariot stuck in the morass (see the note at Judges 4:7); or he might leave his chariot in order to mislead his pursuers, and in hope of gaining a place of safety while they were following the track of the chariot-wheels and the bulk of the host.
Related Commentaries of Judges 4:15
Judges 4:15
15 And the LORD discomfited Sisera, and all his chariots, and all his host, with the edge of the sword before Barak; so that Sisera lighted down off his chariot, and fled away on his feet.