ducatiboy said:
There might be another problem, but we should find out from other people to know for sure, but you might need to keep your stock head unit installed behind the dash or something to still provide a signal for the add on dvd system. I think that some ford dvd systems will only work if the head unit is installed. I remembed seeing some guys with the Z1 in the dash and the old head unit stuck behind the dash. You might need something like that.
I saw the same thing in a thread here. But after looking at the factory wiring diagrams, it seems the rear entertainment system is actually turned on with the head unit...so you need to be able to accomplish that with the Z1. Now, that brings up another interesting question. The factory sub amp is turned on by the factory head unit too...but there is an interesting twist. It evidently uses a 5V signal to turn it on and the Z1 issues a 12V signal. This causes a very loud and annoying pop whenver you turn on the Z1 and could possibly cause issues down the road. Ducatiboy can show you just exactly how to get around this with a regulator. So this raises the question as to what exactly is the signal the head unit uses to turn on the rear system? I think some exploratory work with a wiring diagram and digital meter would answer all those questions.
By the way...I know of a guy who bought a FACTORY rear entertainment system off eBay from a wrecked Aviator. He installed it in his Aviator with an aftermarket head unit and got it to work perfectly for him. So it can be done without using the factory head unit.
I wouldn't hesitate to try this. Looking at the factory wiring diagrams, I just don't see a major problem with it. It may take some head scratching, but it should be able to be accomplished.