I can't make out on the diagram you posted what that wire is going to, more because of my bad eyes than anything else. Have no clue what or where my diagram got to. I've pretty much rewired my own way the car I have, so the diagram at this point is useless for my car.
But remember, if it is blown it did it for a reason. So don't replace it with regular wire, and try to figure out why it blew first. Probably one of the hacks the PO did caused it though.