ARMY TM 9-6115-672-14 AIR FORCE TO 35C2-3-444-32 MARINE CORPS TM 09244A/09245A-14 4-47 TABLE 4-4.  UNIT TROUBLESHOOTING (CONTINUED) OK   Not OK   CIRCUIT INTERRUPTER WILL NOT OPEN Continued Repair wire Replace wire 185L16   Not OK Check wire between   Backplane connector P6-N   and K1-X  for continuity,   loose connections or   damage. Not OK Test  Circuit   Interrupter K1 see   Para 4.12.6 Replace Circuit   Interrupter K1   see Para 4.12.6 OK Replace   Backplane   Module see Para   4.8.24 Test wiring in K1   aux relay Aux   Contacts  for   continuity, loose   connections or   damage. see   schematic FO1 Test Circuit Interrupter   Relay K1 Terminal X for   24VDC. OK   Not OK   Notify next higher   level of maintenance. Notify next higher level   of maintenance. OK Continued from   previous page. Not OK