Ok this is whats happend with your lights water did get in to your fuse box down by the drivers feet it gets in trough the rubber gromet where the wiring loom comes in trouh the body of the car.. This happened me earlyer on this year.. How to fix it remove the plastics below the steering wheel buy a tube of good sealer ramm loads of it all around the wiring loom gromet to stop water from getting back in to your car keep the hot air blowing flat out at your feet to help dry it all out if you catch it quick you might save your fuse bord and if not then you will need to do what i had to do i had to take my car to a auto electric man he found out that my light switch was burnt out and so was a black fuse bord bok was also burnt out he got a new switch and fuse bord out of a brakers yard fitted them fom me and left my car back at me 100% total cost 60 euro dont go to lexus they will f**k you right up the ***** best of luck..