TM 5-6115-593-12 TO 35C2-3-463-1 WARNING Set MAINTENANCE LOCKOUT switch to LOCKOUT.      Disconnect   negative   cable from  batteries.    Remove  external  power by    opening    CB101    and    disconnecting power    from    receptacle    J101.        Load terminals  of  generator  set  circuit  breaker (CB2)   may   still   be   energized   with   bus voltage. (1)   Position    circuit    breaker    CB1    (87, figure    4-22,    sheet    2)    in    the    ON position. (2)   At   rear   of   panel,   remove   and   tag leads to circuit breaker. (3)   Using  an  ohmmeter  (Rx1  scale),  test breaker  for  closed  contacts.    If  meter indicates    an    open    circuit,    replace breaker. (4)   Position circuit breaker in open position.        With    ohmmeter    at    Rx1 scale,  test  breaker  for  open  contacts. If   meter   indicates   a   closed   circuit, replace breaker. c.   Test   for   SPST   (single-pole,   single-throw) toggle switches. (1)   Toggle switch to the ON position. (2)   At  the  rear  of  the  panel,  remove  one lead from the switch. (3)   Using  an  ohmmeter  (Rx1  scale),  test switch  for  a  closed  circuit.    If  meter indicates    an    open    circuit,    replace switch. (4)   Toggle switch to OFF position.  Using ohmmeter on Rx1 scale, test for open circuit.      If   meter   indicates   a   closed circuit, replace switch. d.   Test   for   SPTT   (double-pole,   triple-throw) toggle switches. (1)   With switch in center (neutral) position,  check  that  contacts  1-2  and 5-6     have     continuity.          Ohmmeter should be set to Rx1 scale. (2) With switch in up (ON) position, check that     contacts     2-3     and     5-6     have continuity. (3)   With   switch   in   down   (OFF)   position, check that contacts 1-2 and 4-5 have continuity. e.   Test for BATTERY CHRG AMPS meter (11, figure 4-21). (1) Disconnect minus lead from BATTERY CHRG AMPS meter M21. (2) Observing polarity, connect a multimeter (set to measure DC amps) in    series    with    disconnected    minus lead and open terminal of meter M21. (3) Meter  M21  reading  should  be  within +10 percent of multimeter reading. (4) Disconnect test equipment and reconnect lead to step (1). f.   Test of ELAPSED TIME meter (8, figure 4- 21).    To  test  ELAPSED  TIME  meter  M5, check   against   any   time   source   standard such as a wristwatch or a wall clock. Meter M5   should   be   within   +5   percent   of   time sourge. g.   Test of BATTERY CHRG VOLTS (7, figure 4-21).    To  test  BATTERY  CHRG  VOLTS meter   M20,   connect   a   multimeter   across meter M20 terminals.  Meter M20 should be within +5 percent of multimeter reading. h.   Test   of   ENGINE   OIL   TEMP   meter   (13, figure 4-21). (1) Disconnect negative lead from ENGINE OIL TEMP meter M2. (2) Connect  one  end  of  a  precision  (+1 percent)  1,096-ohm  resistor  to  open terminal of meter M2. (3) Connect    positive    side    of    24V    DC source to the resistor connected to the positive terminal of meter M2. (4) Connect open end of precision resistor   to   minus   side   of   24V   DC source. 4-68