FRemove cover from blackout (BO) marker and remove BOmarker bulb (p 6-36). Turn MASTER switch ON and move lightswitch to BO MARKER position. Using multimeter, place redlead in center contact and black lead to ground. If voltage ispresent, replace bulb (p 6-36). If no voltage, wire 24 is defec-tive. Notify Support Maintenance.1G Remove cover from blackout (BO) drive light and remove BOdrive light bulb (p 6-31). Turn MASTER switch ON and movelight switch to BO DRIVE position. Then move BO SELEC-TOR switch to the BOD position. Using multimeter, place redlead in center contact and black lead to ground. If voltage ispresent, replace bulb (p 6-31). If no voltage, go to step H.TA3105202-161TM 9-2350-267-20
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