Guard Alarm II Control Module
Press button "C" RUN SELF-TEST on programming box. Lower display line should read TESTING. If control module is okay, lower line of display will read TEST OK. If control module is faulty, display will read ERRCODE XXX.
Press button "C" RUN SELF-TEST on programming box. Lower display line should read TESTING. If control module is okay, lower line of display will read TEST OK. If control module is faulty, display will read ERRCODE XXX.