Review on Hopkins 40455 Vehicle Trailer Wiring by Tim Evans

IF and ONLY IF your Mariner had a factory towing kit. This is a great plug and go suspension. However, my car didn't have a factory tow kit, but it HAS wires hanging from the bumper (so I figured I could use that). After careful investigation, I have found that if your vehicle does not have a factory tow kit, you will need to replace the ENTIRE Smart Junction Box (SMJ) under the center console (which will cost several hundred dollars). The signal lights on the trailer wiring harness are powered by a logic circuit in the SMJ. There is no fuse or relay you can add to activate it, it is part of the SMJ.