The REDARC Tow-Pro TPH-018 wiring harness offers the ability to connect the Tow-Pro Elite or Tow-Pro Classic electric brake controller into an existing Hopkins brake controller harness installation. The Tow-Pro Wiring Harness contains fitting instructions and the loom with compatible connector. The Tow-Pro Harness allows you to connect to the Tow-Pro Elite electric brake controller to the vehicle's factory fitted connector with an easy plug and play design. Simply plug one end of the harness to the electric brake controller connector and then plug the other end to the factory fitted connector behind the vehicle dash. These harnesses will also connect to the Tow-Pro Classic with a small modification. The Tow-Pro Classic does not have a mating connector and requires bare wires to be inserted into the brake controller instead.