Control board interior lighting where?

According to the opinion of 3 autoelectricians, I shot up the control board for the entire interior lighting.2 Ford Shops can’t give me a statement where the thing is located, one of them means that I don’t have it at all, but without hesitation this one has copied and handed over schematics of the interior lighting, but I look at it like a pig in the gearbox, I have already moved a lot about the thickness but for that my knowledge is then not enough or you save me Time. Can someone tell me where the thing is, if at all? Thanks Sven