Im having the exact same problem with the headlights, came down one morning to find the little buggers on full beam!!! The light relay in my fuse box was making more noise than the engine so i presumed that was knackered!!! where can i get hold of a new relay, have tried on ebay and google etc but have had no luck? Lexus Canterbury have quoted me £25-30 for a new one, wondered if you can get them cheaper anywhere else?
Are people finding that this problem still rears its head after the light relay and fuse box have been replaced or fixed???