Hacker, if you're installing a factory radio the plugs in your dash should fit the stereo, the only time you need a wiring harness is when you are installing an aftermarket head unit. If the previous owner cut the factory harness to install their radio then you'll need to find a totaled truck in a salvage yard, cut the factory plugs out of that truck and splice it into yours. But if you're going through all that hassle you should look into an aftermarket head unit; you'll get more power, better sound and more features.
2007 F150 King Ranch
6" ProComp lift, 18x9 ProComp 5001's, 325/60/18 TerraGrapplers, K&N CAI, Borla exhaust.
Last edited by Scansabr; 07-10-2014 at 07:10 PM.