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Short Circuit broke Climate Control and Cruise Control?

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Hello all,
First-time poster, but I have found this forum to be very helpful. After passing my test, I decided to buy a Jaguar X-Type. I love my car. It's a 2006 RHD model, with a 2L manual diesel. It runs great, and I love how comfortable it is.
Recently, when browsing this forum, I found a few posts talking about the accessory sockets behind the glovebox and in the boot of the X-types. Having a 12v socket in the glove box of my car appealed to me, so, after doing my research, I tried to embark on installing them. I should mention that I am an electrical engineering student, so I can generally handle electrical matters.
After purchasing and installing the R2 Accessory relay in the passenger side fuse box, I was confused as to why there was no voltage between either the black and brown or the black and brown-green wires in the accessory connector. I thought I had maybe tested the wrong cables so I shorted what I thought was the load end of the relay to do a continuity test. It was at this point I realised I had not disconnected the battery, as there was a crack, and the cable I used to short the pins began to smoke!
I immediately pulled the cable out and did a visual check of the fuse board and could find nothing wrong, so I turned the ignition, where I found a warning light on my dash, with a note in the message centre saying "CRUISE NOT AVAILABLE". Then I noticed that the fans were not coming on, so I navigated to the climate section of the infotainment screen to find a message there also, saying "communications failure, consult your main dealer". So now I can't use the A/C, heating, Demisters, air recirculation or heated seats. On top of all this, my cigarette lighter socket also no longer works!

So I was wondering if anyone knew why it was just these systems that failed? It seems odd for them to fail, as they are seemingly unrelated to each other. No fuses have blown that I have found so far either, adding to the confusion. I'd be grateful if anyone could explain to me what went wrong, and how I could fix it, if it is possible for me to do so?.

Thanks, and sorry for the long explaination.

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