I was looking at the fuse box under the passenger side cover and found the antenna cable. There is a connector just below the fuse box and the wire runs under the center of the clam to the front of the car. I found this out too late as I installed HID lights. The lights interfere with my fm reception. Oh well most of the time I cant hear the radio anyway.
The power supply is probably a switcher. They usually operate at a few hundred KHz switching frequency, but, when unfiltered, can produce broadband noise. You could put low pass filters right at the output, and possibly input, of the HID power supply which should reduce the noise picked up by the radio.
i just picked up my 2002 Jaguar Xtype car (i am finishing off the remaining 1yr on the 3 yr lease). I put the FM radio on and got great reception, but whenever i put the rear defroster ON, the radio signal is gone and all i hear is static. Anyone know how to fix?