Just did a quick check, as I have to leave for work in an hour. Yes my trailer harness is a little melted on one end (not badly and it's just the connector not the actual wires). Also I noticed there are little nicks in the harness in the wires around my tail lights, which is really odd because no one has done wiring work on this car. I bought it from a college teacher with full service records and the only repairs it had done was a new CV. Is this normal?
I did a google search for "1999 subaru impreza melted trailer harness" and found nothing. Is there a recourse guide to what happened to other owners?