TM 5-5420-226-20-1 .— Symptom-69 DETAILED TROUBLESHOOTING PROCEDURE T SUPPORT SYSTEM -  VEHICLE LIGHTING (Continued) 7   Check master control panel    accessories harness (CKT   514-515) panel    connector for   electrical power. First l l l l l l technician (Operator’s Station) Set   MASTER BATTERY swl[ch OFF. Displace master control panel (page 10-33). Disconnect front accessory harness connector from master control panel. Connect red   probe   of  meter   to  contact C(CKT 514-5 15) of   master control panel accessories harness panel connector and    black probe to   ground. Set   MASTER BATTERY switch ON. Check if  meter indicates 18  to   30   volts    dc? Does   meter indicate 18  to   30  volts   dc? l   Replace master control panel (page  10-91). l   Install    basket-control panel I accessories harness at   basket BASKET DISCONNECT s ~+0 TO   VEHICLE CONTACT C GROUND (CKT   514,   515) 7_z~ --- . ) l   Inspect basket-control panel accessories harness    for   bent/ broken    connector contacts or loose   CKT   514-515    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-control panel   acces- sories    harness. l   Connect basket-control panel    accessories harness to master    control panel. l   Install master control panel (page 10-33). D   Install basket-control panel accessories harness connector at    basket- disconnect. m TA10736O 4-671