So since i bought the car I've been having this problem, but it becomes more frequent now. Sometimes when I turn the car on, the AC and radio will not work unless I flick the headlights on and off a couple times, sometimes for a few miunutes tho. And more recently I will be driving and the radio and AC will jsut flick off, and to turn it on I need to flip the headlights repeatedly again. It was never a problem until today when they were playing the Ballad of John and Yoko, one of my favorite tunes, and it just shut off.

Was just wondering if anyone knew what the problem was, and how it could be fixed

 

That's one of the relays behind the right under dash panel, I forget which one but I think it'd the DBC10009. The relays are labeled, pull the dash liner and have a look. If you figure out which one you need, and then find they ae no longer supplied by Jaguar, get in touch if you want a good used one.