TM 5-5420-226-20-1 DETAILED TROUBLESHOOTING PROCEDURE INDICATOR -  LAMP Symptom-45 (Continued) Check CKT    407   for   continuity from    indicator lamp (terminal 2)  to   personnel heater Hi/LO switch (terminal 2). technician    (Operator’s   Station) l   Set  HEATER MASTER switch OFF. l   Displace master control panel (page 10-33). l   Disconnect basket-control panel accessories harness from master control panel. l   Remove    4 screws,    nuts   and   washers   from   master    control panel accessories harness connector and unmount connector from master control “panel. 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   terminal 2  of   indicator lamp assembly (CKT 407). l   Connect black probe of   meter tm  terminal 2  of PERSONNEL HEATER HI/LO switch (CKT 407). l   Check   if  meter   indicates continuity. Does    meter indicate continuity –~ . Replace personnel heater indicator lamp   electrical lead (CKT    407)    (CKT 407). ) Replace personnel heater indicator lamp   socket (page 10-77). @J o- n n— +.0 PERSONNE HEATER Hi/LO SWITCH INDICATOR= d / LAMP ASSEMBLY / ACCESSORIES HARNESS CONNECTOR oc) MASTER CONTROL PANEL (REAR VIEW) TA1072O1 4-512