Hey FTE, does anyone know about the base wiring of 2008 F350 XLT? What I am meaning is this: I have a 2008 F350 XLT with small mirrors and I want to change them to towing mirrors and want to know if the wiring harness are in the doors for towing mirrors so I will have the turn signals and heater working in the upgrade. Also, I would like to modernize the technology in the cab and install a NAV system in the dash. I see on EBAY there are several that will connect directly to the truck with the necessary in dash pigtails and connections. My original question is: Does Ford wire their trucks to include the base wring for upgrades of this type?