Mice Damage To Wiring...where To Start?

Not sure if anyone else has experienced this, but over winter a family of mice seem to have nested in my air filter and caused all sorts of damage especially to the wiring. A lot of the wiring has been stripped and something has shorted somewhere. Have stripped it all down and separated the wires from each other, checked the fuses that I am aware of and still no life to the beast.

Any suggestions?

I would replace that section of wire harness. Had the same problem in an old truck stored at a lake