I currently have a Focus LX Sedan with the basic Instrument Cluster. All i want to do is to replace it with the Cluster found in high models. The Cluster with a tach and oil and stuff. I don't want anything fancy, I was thinking of getting one from a junk yard. My question is, do i need and wiring harnesses or are all of the plugs already in there and its just a matter of taking out the old one and plugging in the new one. Please help me out with this. Thanks