TM 9-2320-386-10 2-24. OPERATION OF VEHICLE SERVICE LIGHTS Select and set light switch for lighting required. See following chart for switch positions. .WARNING. When hazard warning lights/emergency flashers are in use, they override brake lights/stop lamp operation. Therefore, when driving with hazard warn- ing lights/emergency flashers operating, be prepared to use hand signals to indicate a stop. Failure to do so may result in injury to personnel. CAUTION To move main switch lever from OFF to any ON position except B.O. marker, unlock switch must be lifted to UNLOCK position. Failure to do this may result in damage to light switch. NOTE • For turn signals, move main switch to either service drive or stoplight position. Move turn signal control lever up for right turn and down for left turn. Move to neutral to deactivate turn signals. • During blackout operation, the back lighting of the LCD display on the (CTIS) ECV can be turned off by momentarily pressing the off button, for no longer than two seconds. To switch backlighting ON, the CTIS system must be turned off by pressing and holding the off button for more than two seconds, then pressing the on button which will reactivate the CTIS system. CAUTION TO MOVE MAIN SWITCH LEVER FROM OFF TO ANY ON POSITION EXCEPT B.O. MARKER, UNLOCK SWITCH MUST BE LIFTED TO UNLOCK POSITION. FAILURE TO DO THIS MAY RESULT IN DAMAGE TO LIGHT SWITCH. NOTE FOR TURN SIGNALS, MOVE MAIN SWITCH TO EITHER SERVICE DRIVE OR STOPLIGHT POSI- TION. MOVE TURN SIG- NAL CONTROL LEVER UP FOR RIGHT TURN AND DOWN FOR LEFT TURN. MOVE TO NEUTRAL TO DEACTIVATE TURN SIG- NALS. MAIN SWITCH B.O. MARKER STOP LIGHT DIM AUXILIARY SWITCH UNLOCK SWITCH FOR SERVICE PARK, MOVE MAIN SWITCH TO SERVICE DRIVE. MOVE AUXILIARY SWITCH TO PARK. FRONT RIGHT RIGHT LEFT LEFT BLACKOUT MARKER BLACKOUT DRIVE FRONT REAR REAR LEFT RIGHT LEFT INCLUDES B.O. STOP-LIGHT AUXILIARY SWITCH OPER- ATES INSTRUMENT PANEL LIGHTS WHEN MAIN SWITCH IS IN ANY ON POSITION. FRONT RIGHT LEFT RIGHT LEFT STOPLIGHT (BRAKE LIGHT) REAR FRONT LEFT RIGHT SERVICE DRIVE REAR LEFT RIGHT FRONT LEFT RIGHT SERVICE DRIVE REAR LEFT RIGHT 2-68