Turbante literally means "turban," a head covering. It's an interesting and somewhat unexpected word to find in a rock song, making it memorable.
In the context of "Turbante noche," Cerati uses it metaphorically to describe the night itself. It evokes an image of the night being wrapped or veiled, perhaps suggesting mystery, darkness, or a sense of being enveloped, setting a unique and intriguing atmosphere for the song.