TM   55-2090-201-14&P 3-49. MINI-PROBE, TYPE  A  AND  B  SEPARATORS    (Continued). L O C A T I O N ITEM A C T I O N R E M A R K S Meter Reading Test   Procedure (VDC) Test   Conditions Remarks grounds   the mini-probe's test    terminal.    24 second   stage solenoid    operat- ed  oil  discharge valve  (11)  will open.    The  sole- noid   operated water    discharge valve  (8)  to close,    and  the overboard   dis- charge  light  (9) will  go  out.  Re- place  the  mini- probe  (5)  if  a 24 ± 5 VDC reading  is  not obtained. C.  Connect  the test   meter leads  first to   contacts 6 and 9 and depress   the second   stage oil  dump light/button (10). Con- 24 nect  the  test meter   leads to   contacts 7  and  9.  De- press  the second   stage oil  dump light/button 0 (10). C.  A  24  VDC  read- out  between  con- tacts  6  and  9 indicates   second stage  oil  dis- charge   valve (11)  and  second stage  oil  dump light/button (10)  are  receiv- ing  a  signal from  the  mini- probe  (5).  The printed   circuit board  is  func- tioning    proper- lY. A  zero  read- out  between  con- tacts  7  and  9 indicates   the water    discharge valve  (8)  and 3-390