New to the forum and already have a question

[firetapped]

First let me say hi to this forum. Hi.
Now here is my question and I hope someone has an answer for me, I resently purchaced a 2004 Jag XJ8 and I have been haveing a problem with the headlights. They will blink on and off by themselfs at night when driving home it is a consistant problem and the dealer cant find a code related to the problem, they have tried reflashing the computer module and then replaceing it but the problem still persists. Has anyone here had this problem or one simular that I can ask the dealer to take a look at. They are the xenon lights, if that helps at all.
Thank you for looking and I hope someone here has an solution.