TM 5-5420-226-20 -.. Symptom-59 DETAILED TROUBLESHOOTING PROCEDURE FROM STEP SUPPORT SYSTEM -  VEHICLE LIGHTING (Continued) o² 1 . Check basket-light switch harness (CKT 15) for continuity from   intermediate connector to  connector at   LIGHTING CONTROL switch. Technician   (Operator’s   Station) l   Set   MASTER BATTERY switch OFF. l   Disconnect basket-light switch harness intermediate connector (CKT 15)  from    master control panel power harness connector. l   Set  multimeter to  OHMS X 1 scale   and   “zero” meter,    or use   STE/ICE Test No.    91  (page 4-83). l   Connect    red   probe   of  meter   to  center   contact   of  basket- light    switch harness (CKT 15)  intermediate connector at   LIGHTING CONTROL switch. l   Connect    bIack   probe    of  meter    to  contact    F  (CKT    15)  of basket-light switch harness connector at    LIGHTING CONTROL switch. l   Check  if  meter   indicates continuity. Does    meter indicate continuity? m 0- n 1^. 0 iNTERMEDIATE 0 3.  ?, & ~,  3. CONNECTOR >,   0“ ‘c 0“   ~~ Go3, ( Repiace master control panei power harness (page 10-101). k > I I CONTACT #   (CKT    15) ) l   inspect basket-iight switch harness for bent/broken connector contacts or    loose CKT 15 wire at rear of connectors. l   Repair    connectors if  defective (page 10-298). l   If connectors are not defective, notify support maintenance of a defective basket-iight switch harness. l   Instail master controi panei (page   10-33). TA10729O 4-601