TM 5-5420-226-20-1 Symptom-69 DETAILED TROUBLESHOOTING PROCEDURE T SUPPORT SYSTEM -   VEHICLE LIGHTING (Continued) 1’^{Check   B.O.  SELECTORswitch   for}  continuity^{(switch    in} IR   position). Firsl l l l l l Technician (Operator’s Station) Set   B.O.    SELECTOR switch to   IR, Disconnect master control panel accessories harness connector (CKT 514-5  15)   from B,O,    SELECTOR switch. Disconnect basket-light switch harness connector (CKT 19)   from B.O.    SELECTOR switch, Connect red   probe   of  meter    to  center contact and   black probe to   top   contact of   B.O.    SELECTOR switch. Check if  meter indicates continuity. Does    meter indicate continuity? l   Replace’    B.O.   SELECTOR switch (page 10-58). l   Connect basket-light switch harness connector to   master controi panei. AC NO V t 1 CKT I W* CONTACT CKT inspect basket-iight switch harness for   bent/broken connector contacts or   loose CKT    19  wire    at   rear   of connectors (CKT   19)  from   B.O. SELECTOR switch    to LIGHTiNG CONTROL switch. Repair connectors if  defective (page 10-298). if  connectors are   not defective, notify support maintenance of   a  defective basket-iight switch harness. Connect basket-iight switch    harness connector to LiGHTiNG CONTROL switch. instaii    master controi Danei (page 10-33). TA107357 4-668