A R M Y TM  5-6115-612-12 MARINE  CORPS  TM  6115-12/7 AIR  FORCE TO 35C2-3-471-1 N A V Y AG-320B0-0MM-000 4-67.  LOW OIL PRESSURE SWITCH. (cont) SHUTDOWN a. Inspection. (cont) (4) Inspect switch (2) for cracks or other damage. Replace switch if cracked or damaged. (5) Inspect electrical connector (3) for damaged pins, burns, or corro- sion. Replace switch if connector is damaged. (6) Install engine housing access cover and secure with turnlock fasteners. (7)  Connect  battery  cable  plug connector  to  battery. b.   T e s t . WARNING To  prevent  injury,  ensure  that battery is disconnected  before performing maintenance o  n electrical   components. (1) Disconnect battery cable plug connector from battery. (2) Loosen turnlock fasteners and remove engine housing access cover. (3)      Disconnect electrical connector  from  low  oil  pressure  switch ( 2 ) . U se multimeter and measure resistance    between    contacts    of    switch electrical     connector     (3). Resistance should be a minimum of 5.0 megohms. (4) If resistance is not within limits,    replace    switch. (5) Install engine housing access c  o  v  e  r and secure with turnlock f a s t e n e r s . (6)  Connect  battery  cable  plug connector to battery. c. Removal. WARNING To  prevent  injury,  ensure  that battery is disconnected  before performing maintenance on electrical  components. (1) Disconnect battery cable plug connector from battery. (2) Loosen turnlock fasteners and remove  engine  housing  access  cover. (3) Disconnect electrical con- nector    from oil pressure switch electrical  connector  (3). (4)  Remove  oil  pressure  switch (2) and preformed packing (4) from tube cross  (5). Discard  packing. d. Installation. (1) Install new preformed packing and oil pressure switch (2) into tube cross  (5). (2) Connect electrical connector to  switch  electrical  connector  (3). (3) Install engine housing access cover and secure with turnlock fasteners. (4)  Connect  battery  cable  plug connector to battery. 4-68. CONTROL  PANEL  ASSEMBLY. Main- tenance of control panel (figures 4-43 and FO-4) consists   of inspection, testing, and repair. 4-130