TM   5-5420-226-20-1 DETAILED TROUBLESHOOTING PROCEDURE VEHICLE OPERATION -  POWERPLANT, STOPPING Symptom-17 ENGINE FUEL    SHUT    OFF   SWITCH WILL NOT   STOP ENGINE. This  procedure is to  be  performed by two persons. The lead person is referred to  as  the  first  technician and shall  direct   the  activity    of  the  second person   called   the  second    technician. Check    front    accessory harness connector (CKT 54A  at   bulkhead disconnect for   electrical power. First Technician (Commander’s Station) l   Displace   front   accessory   harness   connector    (CKT   54A) from bulkhead disconnect (page 10-269). l   Set  multimeter to  measure 18 to  30  volts   dc,  or  use  STE/ ICE  Test   No.   89 (page   4-81). l   Connect    red   probe   of  meter    to  contact    B  (CKT    54A)   of front accessory harness connector and    black probe to ground. Second Technician (Operator’s Station) l   Set   MASTER BATTERY switch ON. l   Momentarily set   ENGINE FUEL SHUT OFF switch in   up   position, then release it. First Technician (Commander’s Station) l   Check    if  meter   indicates    18 to  30  volts   dc  while   switch   is in   up   position. , Does   meter    indicate 18  to   30  volts   dc? I FOR   CLARITY QUADRANT ASSEMBLIES NOT   SHOWN --- (CKT   54A) BULKHEAD DISCONNECTS l   Check    basket-control panel starting harness connector (CKT   54A)   at   basket disconnect for   electrical power. \ TA106996 4-307