TM   10-3930-643-20 ELECTRICAL  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE. 5-8. Instrument   Panel   Troubleshooting. MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION d. ENGINE  OIL  PRESSURE  WARNING  LIGHT  DOES  NOT  OPERATE. Step   1. Remove  socket  and  check  the  engine  oil  pressure  warning  light bulb. If   the   bulb   is   burned   out,   replace,   refer   to   paragraph   5-25. NOTE Before   proceeding   with   continuity   test,   refer   to   paragraph   2-13   for i n i t i a l    s e t u p    i n s t r u c t i o n s. Step   2. Test   the   continuity   of   the   oil   pressure   switch.   Disconnect   the wire   assembly   from   the   switch,   as   shown.   Connect   multimeter   to terminals   on   the   switch. If   multimeter   needle   does   not   move,   the   switch   does   not   have continuity.   Replace   the   switch,   refer   to   paragraph   5-41. 5-43

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