mattmal9
New member
Hey guys, I started installing a head-unit in my friends truck (2013 F250 XL Crew Cab with am/fm/cd and 4 speakers). He bought the installation harness from best buy. It fits the plug correctly but the unit doesn't turn on. I double checked my connections and they were good but the unit isn't getting power. Do I need to run a 12v wire that comes on when the ignition is turned on? Or do any of you guys have a wiring diagram for the factory radio wiring? Any help is appreciated.