I have a Skoda superb 1.9tdi automatic 2005 my front courtesy lights don't work Skoda said that I need a new J393 control box which is located somewhere under the carpets & is gonna cost over £400 to repair it, if this is the fault can anyone lead me step by step as to where it is & is it possible for a novice like me to replace, what I don't understand is that it is only the front courtesy lights that are gone & the lights on the exterior mirrors but the rear courtesy lights work OK  - any help or advice would be great.

Look at the pinned thread for "water ingress problem"