Sorry to bring up an old thread, but I was wondering about this "Stick on Key Pad" you are talking about JP. Do you have a link to it?jpark said:Welcome to E-C!
Here's the wiring diagram for the Sirius, upper console display, and interface modules:
I also put this diagram in a thread: viewtopic.php?f=27&t=1594
As for the keypad, the wired (factory) keypad and both the older and newer stick-on keypads will all work with the 2008 Tribute. The newer stick-on keypad is the easiest to install, and it has a smaller and cleaner shape than the older keypad.
If you want to add the wired-in factory keypad, you'll need buy the factory wiring harness, and you'll need to cut a rectangular hole in the door.