Metra 70-6502 Receiver Wiring Harness
2002 Jeep Liberty
Crutchfield Customer Review (What's this?)
A great way to utilized the existing wiring on the vehicle, and a time saver, just follow the instructions and you will have no difficulties (unless you are colorblind) connecting the device.
Pros: Able to use the original wiring, saving you money and time!