What was found
MAG WAS OVERHAULED AND PUT IN SERVICE 12-94. NEW NR ES652 COIL WAS INSTALLED AT THAT TIME. COIL BECAME INTERMITTENT IN ABOUT 50 HOURS TIME IN SERVICE. COIL WAS REPLACED WITH NEW NR ES10-357164-1 WHICH SOLVED PROBLEM. OCCASIONALLY, MAG WOULD QUIT COMPLETELY. COIL MFG. DATE - 11/90. COIL TESTED OKAY WITH OHM METER. COIL TESTED INTERMITTENT WIHT COIL TESTER.