My dog has chewed and destroyed the tow connector on the factory wiring harness underneath the vehicle. I also believe this has caused my left turn signal to malfunction. I have looked everywhere online to find a replacement wiring harness and can't find one. The tow cable looks to connect to a bundle of wires that go up through the left brake lights and further up. I'm afraid I will have to take to dealership to fix? Any suggestions or comments?