TM 9-2320-365-20-1
2-597
OPERATIONAL TEST
(1) Position main light switch to BO MARKER
(TM 9-2320-365-10).
(2) Observe front blackout marker lights and
determine how many lights do not illuminate.
(3) If both marker lights do not illuminate,
go to step 5 of this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).