MY 2003 LINCOLN NAVIGATOR HAS SHUT DOWN COMPLETELY THREE TIMES IN THE LAST 6 WEEKS. TWO OF THE OCCASIONS HAPPENED ON THE INTERSTATE WHILE DRIVING ABOUT 55 MPH, THE THIRD INSTANCE HAPPENED IN MY SUBDIVISION DRIVING LESS THAN 30 MPH. AFTER PULLING THE TRUCK OVER TO THE SIDE FOR SAFETY THE TRUCK WILL NOT START IMMEDIATELY BUT WILL START AFTER RESTING ABOUT 7 MINUTES. WHEN THE TRUCK SHUTS DOWN SEVERAL LIGHTS ON THE DASHBOARD LIGHT UP. I EXPLAINED THE ISSUE AS WELL AS I COULD TO MY LOCAL FORD / LINCOLN DEALERSHIP IN MADISON, TN BUT THEY COULD NOT FIND ANY ISSUES WITH IT SAYING THAT NO CODES WERE SHOWING. I ALSO TOOK THE TRUCK TO A GOODYEAR SERVICE REPAIR IN BRENTWOOD, TN BUT THEY ALSO COULD NOT DIAGNOSE THE PROBLEM. AFTER SEARCHING FOR THIS TYPE OF ISSUE ON THE INTERNET I FOUND NUMEROUS CUSTOMERS THAT HAVE HAD A SIMILAR EXPERIENCE, SOME SAYING THAT THE ISSUE IS RELATED TO THE "FAIL SAFE" SECURITY OPTION KICKING IN WHILE A PERSON IS DRIVING. THE ISSUE OF HAVING MY TRUCK SHUT DOWN COMPLETELY ON THE INTERSTATE IS DANGEROUS AND I WOULD APPRECIATE HELP ON GETTING THE ISSUE RESOLVED AS SOON AS POSSIBLE.