So my saga goes on, I recently jump started my x150 and replaced battery, initially I had no a/c radio touchscreen etc, I replaced all relays and fuses in all 3 compartments and now have everything working except touchscreen and cd/radio.
I have taken it to a non Jaguar auto electrics ( to save cash) who reckon it might be a condenser ?, they said that it is trying to connect to the ecu but not getting through ?

Any ideas would be greatly appreciated, before I take it to the exuberant dealership, cheers Ali

 

Exuberant…. interesting choice of words.
But there is a phrase…. you get what you pay for.

Actually, as I know nothing of your car and your length of ownership with it, nor even if you have a relationship with a dealer… please be advised you may be out of luck.
Further, we cannot offer assistance until we see what codes you are throwing. Throwing the dart and guessing the problem or, musical parts with musical service providers is going to cost you much more in the end.
The fact the battery is “new” means nothing. Specifically, what is the resting voltage on this new battery?

And be aware, the very first pinpoint check in the workshop manual is “confirm battery health”, and its there for a reason.

 

You say you replaced the battery, but did it ever get FULLY charged before you drove it? 99% of all 'new' batteries sat for a long time and were installed in a low-voltage state.
OR, you may need a new TSD. (Touch Screen Display)