A R M Y TM  5-6115-612-12 MARINE CORPS TM 6115-12/7 AIR  FORCE TO 35C2-3-471-1 N A VY AG-320B0-0MM-000 4-78. SWITCHES. (cont) a. Test. (cont) (c) Place multimeter probes on terminals 1 and 2 of CONTACTOR switch. (d)  Place  CONTACTOR  switch  in CLOSED   position.   Multimeter   reading should be less than one ohm. If  read- ing is more   than   one   ohm,   replace CONTACTOR  switch  (paragraph  4-78b). (6) Tag and disconnect wires and perform continuity check   on   P A N EL LIGHTS switch (30, figure 4-43). (a) Place    multimeter probes across  terminals  of  PANEL  LIGHTS  switch. (b) Move switch between ON and OFF. Multimeter reading should go from about  one  ohm  (ON)  to  a  very  high resistance  (OFF). If  not, replace PANEL  LIGHTS  switch  (paragraph  4-78b). (7) Close control panel and secure  with  turnlock  fasteners. (8) Close control panel access door. (9)  Connect  battery  cable  plug connector  to  battery. b. Replacement. Replacement pro- cedures   for   the   DC   CIRCUIT   BREAKER switch, CONTACTOR switch, and the PANEL LIGHTS switch are the same as those for the  MASTER  SWITCH  (paragraph  4-70). 4-79. HIRING HARNESSES. Maintenance of  the  wiring  harnesses  consists  of inspection, testing, repair, and replacement. Each  wiring  harness  is made   up   of   tie-wrapped   cables that interconnect  all  of  the  sensing/control inputs   and   outputs   leading   to   the engine  and  generator. See  F0-1  for wiring  harness  locations. a. Inspection. WARNING To  prevent  injury,  ensure  that battery is disconnected  before performing maintenance o n electrical components. (1) connector (2) door. (3) Disconnect  battery  cable  plug from  battery. Open control panel   access Loosen turnlock fasteners and open control panel. (4) Disconnect wiring harness connectors one at a time from terminals on back of control panel. (5)  Inspect  wiring  harness  con- nectors for evidence of excess wear or damage such as broken or bent connector pins, broken wires,   or unsoldered wires. (6)  Connect  wiring  harness  con- nectors to control panel. (7) Close control p a n el a  n  d secure  with  turnlock  fasteners. (8) Loosen turnlock fasteners and remove EECM access cover. (9)  Disconnect  wiring  harnesses that mate to EECM. Inspect for bent pins, loose or broken wires, or damaged mechanical parts   on the connector bodies. (10) Connect wiring harness connectors to EECM. 4-141