-— TM 5-5420-226-20-1 Symptom-74 DETAILED TROUBLESHOOTING PROCEDURE FROM STEP SUPPORT SYSTEM -   PERSONNEL HEATER o (Continued) 2 1 I . . ) m Check terminal 4    of PERSONNEL HEATER Hi/LO switch   for  electrical power.    (PERSONNEL HEATER    H1/ LO   switch ON/LO). l   Set   HEATER MASTER switch OFF. l   Displace    master    control pane]   (page 10-33). l   Disconnect basket-control panel accessories harness from master control panel accessories harness connector. l   Remove 4 screws, nuts, and washers from master control panel accessories harness connector and unmount connector from master control panel. o Set  mtdtimeter to  measure 18 to  30  volts   dc,  or  use  STE/ ICE    Test No. 89   (page 4-81). l   Connect red   probe    of  meter to   PERSONNEL HEAT- ER HVLO switch terminal 4    and black probe to ground. l   Set   HEATER MASTER switch ON. l   Set   PERSONNEL HEATER HVLO switch ON-LO. l   Check   if  meter   indicates 18  to   30   volts    dc. . Does    meter indicate 18  to   30   volts    dc? # GR .0 TOOVEHICLE 7 IOUND PERSONNEL c ‘EATER *I  VLUIUI I w MASTER CONTROL PANEL HI/LO switch  (page  10-77). I . connect personnel heater w control harness connector to personnel heater fuel    pump. I b . Replace PERSONNEL HEATER Hi/LO switch jumper lead. l   Connect personnel heater control harness connector to personnel heater fuel    pump. P ! TA1074O2 4-713