I retained the fans I was already running, Ramchargers fans from back in the day, basically Dodge Intrepid dual fans, I think the Ramchargers ones are rated the same CFM, they take the factory wiring for those cars and the fans look identical. I had a controller that used a probe into my upper coolant hose, worked fine for years but was cleaning things up and replacing the hose, decided to look into other setups. I have the Dakota VHX cluster and it helped lead me to this fan controller, since I have the Dakota stuff already it made the install a bit simpler since I could tap into some sources that already exisisted, coolant temp, power, ignition, ground, that type of thing. I created a whole new harness from scratch though using a new Intrepid plug, finding those cars isn't as easy as it used to be since they are 20 years old now, then new wire to the relays that came with the controller. I'll see if I can find pics. The Dakota manual laid out some wiring examples depending on what fan setup you run so I followed that.