F-16s have radar but it may not be in the right mode (auto-acquisition/"dogfight" mode) during an ILS approach. According to an experienced F-16 pilot, ILS does work while the radar is searching for contacts in front of the aircraft.
Most fighter-to-fighter mid-air collisions occur during dogfighting practice, or during formation join-up. In both these situations, the radar might not show the other jet. Again the radar has to be in "dogfight" mode to have any chance of finding the other jet in close. The pilot would not be manually adjusting the radar scan position during a a visual join-up.
Most fighter-to-fighter mid-air collisions occur during dogfighting practice, or during formation join-up. In both these situations, the radar might not show the other jet. Again the radar has to be in "dogfight" mode to have any chance of finding the other jet in close. The pilot would not be manually adjusting the radar scan position during a a visual join-up.