TM  10-3930-638-24&P 3-13.   STARTER   AND   SOLENOID   REPAIR   (cont) a.  Armature  (10) b.  Armature  (10) STEP LOCATION ITEM ACTION REMARKS TESTING 16 Test for grounded   Place armature in growler and turn power winding on. Touch one test probe to armature core, the other probe to commutator, as shown. If test lamp glows, the armature winding, or commutator is grounded Test for shorted Position armature in growler. Turn on winding power. Use steel blade provided with tester.  Hold  blade  parallel  with  and touching the armature core segment, as shown 3-108