TM 10-3930-669-20 VERIFY REPAIR (1)  Set  MAIN  POWER  switch  to  ON position (TM 10-3930-669-10). (2)     Set     engine     switch     to     ignition position (TM 10-3930-669-10). (3)  Depress  glow  plug  switch  (TM  10- 3930-669-10). (4) Observe glow plug indicator. (a)  If  glow  plug  indicator  does  not operate,  fault  not  corrected.    Perform Steps    (5)    and    (6)    below.        Repeat procedure and notify  Supervisor. (b) If glow plug indicator operates, fault corrected. (5) Set engine switch to off position. (6)  Set  MAIN  POWER  switch  to  OFF position. 2-243