My 99 XJ8 is somewhat new to me and I have a couple of questions.
The first is regarding the trunk lid. When it is unlocked is out supposed to pop open or stay closed but unlocked?
Second is regarding the phone. Is it programmable to my cell or just something pretty to look at?

 

The trunk stays closed . . . but unlocked.

The phone in a '99 is totally useless. There are a couple aftermarket units that allow you to connect a bluetooth phone to the Jaguar radio . . . and use the steering wheel controls.

https://www.jaguarforums.com/forum/s...t.php?p=190354

 

Okay so the trunk is working as intended.
As far as the phone goes, I guess a good ear peice is the ticket. Thanks for the wiring diagram but I think you're right as far as the functionality of the phones goes. Totally useless.