Re: Aftermarket Stereo Install
1. Technically, Yes... stock harness provides controls,power, and communication between the car, the speakers, and the stereo. The harness allows the stereo to receive power. So, yes you can power the New DVD reciever with the harness... HOWEVER, The harness will not be able to just be plugged in, it will need an Adapter (see below posts)
Check my link in bottom of my signature. This guide will answer many questions you have.
1. go to crutchfield.com
2. outfit your car
3. Choose and see which 2 Din dvd recievers will fit.
4. It will show you what adaptor harness is necessary for a new reciever.
Its late, I will be able to assist you further tomorrow. Good luck! Audio is addicting! no...wait.... Jeeps and everything jeep is addicting.
EDIT: my below posts should help you out for the time being.