My saga of replacing an undiagnosed premium sound system is documented on another thread. That said, if you have a stock sound system in the car, swapping out the radio for an aftermarket head unit really couldn't be much easier? (Do you have functioning opposable thumbs? You can do this.)

If you are installing a Kenwood head unit, I have a Kenwood-to-ISO harness that would connect to a Jaguar-to-ISO harness (like an Autoleads PC2-69-4). Let me know, and I can send this to you for a couple of bucks. Help me clean up this workbench.

 

Randy - which is this? I have an extra, too. I think it's Jaguar to ISO.

 

Could be, although the black part looks a little narrow to be a Jaguar end. Probably for some type of head unit?