TM  10-3930-638-24&P 2-24.   LIGHT   SYSTEMS   TROUBLESHOOTING   (cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION 2. FRONT BLACK OUT LIGHT INOPERATIVE (cont) Step  2. Unscrew and remove cable connector from bottom of VEHICLE LIGHTS switch. With main switch lever on VEHICLE LIGHTS switch in B.O. DRIVE position, connect ohmmeter leads to pins D and F of VEHICLE LIGHTS switch. a. If ohmmeter indicates more than 0.1 ohm, replace VEHICLE LIGHTS switch (para 2-28b). b. If ohmmeter indicates less than 0.1 ohm, check for open circuit in wire between terminal D of cable connector and front black  out  light. 3. BLACK OUT TAIL LIGHTS INOPERATIVE NOTE If one black out tail light operates normally, replace bulb in affected tail light (para 2-30c). If tail light is still inoperative, check for open circuit in wire between inoperative tail light and operating tail light. Unscrew  and  remove  cable  connector  from  bottom  of  VEHICLE  LIGHTS switch. Place main switch lever on VEHICLE LIGHTS switch in SER. DRIVE position. Connect ohmmeter leads to pins E and F of VEHICLE LIGHTS switch. a. If ohmmeter indicates more than 0.1 ohm, replace VEHICLE LIGHTS switch (para 2-28b). b. If ohmmeter indicates less than 0.1 ohm, check for open circuit in wire between terminal E of cable connector and black out tail lights. 2-108