I made a new ceiling light in l/r,box, circuit etc.,powered out of jb marked l/r 3-way.Check power to switch,OK:turn it on,no light.Tic tracer showed hot at fixture; in course of checking noodle back,found 1 in jb nutted to bundle of bare grounds;take it off,
nut it to 'my' white,still nothing;put both whites on the grounds;it works.At THIS point I explained the 'fubar' to the h/o;I'll have to take the boxes apart in the attic space,etc.,i.e more money, and his reply was to "leave it , it works." Some now deceased family member had wired the attic.