So removing the CFG brought back the housing and wig wags work in the night (not too bright and very faint alternating)
Have you enabled HDR after resetting the Prepar3D.CFG file ? Without HDR, it's expected all lights would look much weak. As a reference, see how they are supposed to look like in the attached screenshots.
and in daytime they look solid yellow
Well, this is strange, since the housing and the animation don't change between night and day, perhaps we found another bug in the sim, we'll check this and see if, by creating the objects with our scripting engine instead than using the .BGL format, this might be possibly fixed for everybody, like the floating T5 issue we fixed in the same way.