I just installed the DDX319 with the PAC Kit from Crutchfield. The colors on the Pac kit match right up with the DDX319 harness. Download the install guide and the tech bulletins from PAC: Pac-Audio.com Product Details | iPod Integration for your car and More by Pac-Audio - Connecting you to the future
as you need to add a 1 amp diode (Radio Shack part no. 1N4005) inline on the white/green Pac lead or you experience issues at high volumes.