I just tool a gander at the dauntless site. If you bought their single relay harness, you would have no isolation of any circuits except the brake light circuit. With the single relay harness, if you have a short to ground in the trailer wiring, the high current would run through the factory wiring harness for those circuits that are not isolated. With that said, the factory supplied circuit protection should have protected the wiring harness. Hopefully, you had the correct size fuses installed for those circuits.