TM  9-6150-226-13 Item No. 4 5 6 7 2-22 Table   2-1. OPERATOR  PREVENTIVE  MAINTENANCE  CHECKS  AND  SERVICES  (Cent) Interval Before Before Before Before Location Item to Check/ Service Pigtail Cable and end connectors. Service feeder cable assy. Phase  indicator light Electrical distribution system M40, M40 (AP) M60, M60 (AP) Procedure WARNING High voltage is present in this system. DISE and PDISE supports equipment using 120/208 V ac. Do not rely on the color-coding. The insulation on the wires inside the cable jacket may vary, depending on supplier. Wires will be color coded to designate the phases. If the wire color coding cannot be determined, notify next higher level of maintenance to perform continuity test. Perform a continuity test to verify correct phase designation in accordance  with  identified color. d. Check that all ground wires are securely attached to ground  terminals.  Check connectors, ensure that all pins and connector lugs are serviceable. Notify unit maintenance. e. Check for exposed wiring. Split, cut or damaged insulation. Notify unit maintenance. f. Check for damaged light/ light  socket. a. Check that unused connectors are capped and center lid is closed. Not  fully  Mission Capable  if: Pigtail cable has exposed wires or frayed/missing ground wires. Wiring is exposed, insulation cut, split.