Open Circuit Test
Check for continuity between individual segments of brush end of armature. See Figure. If there is continuity between all segments, armature is good. If there is no continuity, there is an open circuit. Replace armature.
Check for continuity between individual segments of brush end of armature. See Figure. If there is continuity between all segments, armature is good. If there is no continuity, there is an open circuit. Replace armature.