I purchased the guage cluster w/messaging center and the switch to install in my 2005 v6. Should have been an easy install except that the wiring harness was missing everything having to do with the messaging center. I'm going to attempt to contact Ford today but their computers are down. It is my opinion that the vehicle should have included the complete wiring harness that would be capable of supporting the factory options such as the upgraded guage cluster. I have a manual transmission and they did include the wiring for the automatic transmission shifter... so why not for the cluster? An easy way to tell if you have the wiring is to pop off the dummy buttons to the left of the power supply (which is to the left of the hazard light button) on the dash. If you have a connector attached to it, you're good to go. I don't have it.