TM    9-2350-238-10 DRIVER’S  COMPARTMENT  CONTROLS  AND  INDICATORS–  CONTINUED Key 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Control   or   Indicator IR-RCVR   infrared   receiver switch BO-IR   selector   switch instrument   switch SPADE  CONTROL  valve handle MASTER   switch Fuel   prime   and   heater fuel   cycle   switch Pump   and   heater   igniter switch Start   switch Light   switch   assembly Instrument   panel   light Tachometer SUSPENSION  LOCKED indicator   light Suspension   lockout control   valve   handle Speedometer Utility   outlet Guard,   switch Function Turns  on  infrared  lamps  in  headlamps.  Used  with  BO-IR  and main   light   BO   switches. Selects   either   infrared   or   blackout   lights   for   operation.   Used with   IR-RCVR   and   main   light   BO   switches. Activates   start   switch,   air   cleaner   blowers,   and   gauges   on   in- strument   panel. Controls   lowering   or   raising   of   spade. Turns   on   or   turns   off   all   electrical   power   to   vehicle. Controls   flow   of   fuel   from   air-box   pump   to   purge   and   prime high   pressure   fuel   filter. Controls   air-box   heater   fuel   pump   and   fuel   ignition. Activates   starter   to   start   engine   when   master   switch   and   in- strument  switch  are  ON  and  shift  control  lever  is  in  N position. Controls   driving   lights   and   instrument   panel   light. Lights   instrument   panel   and   is   controlled   by   lever   on   light switch   assembly. Indicates   engine   speed   in   revolutions   per   minute   (rpm). Lights   when   suspension   is   in   locked   position. Activates  suspension  lockout  cylinders  to  lockout  suspension system. Indicates   vehicle   speed   in   miles   per   hour   (mph).   An   odometer shows   accumulated   mileage. A   single   pole   24-volt   outlet   that   allows   auxiliary   electrical equipment  operation  from  vehicle  electrical  system. To   prevent   accidentally   turning   on   HYDraulic   pump   PTO CLUTCH   switch. 2-7