This morning when I leave the house, I see my trailer lights aren't working. The brake's lights work but not the "driving" lights. I sort of play with the wiring harness to see if there's a loose connection but nothing. Both harnesses look perfect. Possibly a short somewhere? The truck's lights are fine. This is a one year old trailer. Anything I'm possibly overlooking before I go crawling underneath looking for a broken connection? If there's a short, wouldn't that blow the fuse in the truck?