Trailer lights fuse

[Fergie]

I'm hopeful I found it. Around noon the 30 amp fuse on tractor blew. I was inline to unload so I popped the hood. Couple weeks ago I had the left side headlight wires lose and when closing hood it got in between hood and bumper. I've refastened it bit I looked that over good. They were rubbed a bit rough but nothing threw. Went down the wires from the plug and where 2 yellows joined to make 1 there was an eighth inch cut. Couldn't find a wiring schematic but found one for a 389 and it does look like yellow is for the marker lights. When hood was closed it laid on the frame. Going to tape it in the morning and hope that's it. If we get a rainy spell or after harvest I'll get it fixed properly.