I think this is not complete truth. :)
There are needles and bars on the ADI (both for localizer and glide slope) and yes, these are for ILS navigation, when You are set for ILS approach. So if the bars don't move, when he has PTR switch in ABLE position, right ILS frequency, approaching at the correct runway heading and You are within the ILS beacon range, there is something wrong. :thumbup: