TM 9-2320-209-10-1 d. Operating the Dome and Blackout Dome Lights. (1) Operating 115-volt dome lights under normal conditions. FRAME 1 1. Place POWER SWITCH 115-VAC handle (1) in ON (up) position. 2. Place NO. 4 CIRCUIT BREAKER CEILING LAMP CIRCUIT (2) in ON position. 3. Place OPERATION BLACKOUT SWITCH 115-VAC SYSTEM (3) in down position. 4-212