For most Ford, Lincoln, Mercury from 1982 to 1995 domestic cars and trucks. Easy-to-view digital display shows numeric trouble codes, eliminates the need to count flashes. Tests Ford EEC-IV / MCU systems. Safely accesses on-board computer to read engine codes and perform self test functions. Memory feature stores codes, even when the reader is unplugged The Digital Ford Code Reader includes instructions on OBD I operation and all Ford self tests.