I know this may be of no help but I would go round every plug and socket I could find and pull them apart maybe clean especially if there looks to be damp corrossion etc and re plug back together, The logic controll on auto electrics is all low voltage so very prone to poor contact.. so could well be down to the water you went through a while back...also may go away on its own.....come to think of it it also may get worse, then it may be easier to trace.... thats all.. good luck and lets us all know when you find the problem...