TM  5-5420-226-20-1 Symptom-1 DETAILED TROUBLESHOOTING PROCEDURE -— -- . .+ VEHICLE OPERATION -   POWERPLANT, STARTING (Continued) 1 Check   front   accessory harness    (CKT   14)  at  bulkhead disconnect for   electrical power. First Technician (Operator’s Station) l   Set   MASTER BATTERY switch OFF. Second Technician (Top Deck) l   Connect bulkhead engine disconnect harness connector to   engine disconnect. Both Technicians (Rear Grille Doors) l   Install    transmission shroud. Second Technician (Commander’s Station) l   Displace front accessory harness connector (CKT 14)  from bulkhead disconnect (page 10-269). l   Connect    red   probe    of  meter   to  contact    M   (CKT 14)  of front accessory harness connector at   bulkhead disconnect and    black probe to   ground. First Technician (Operator’s Station) l   Set   MASTER BATTERY switch ON. l   Press    and   release   STARTER switch. Second Technician (Commander’s Station) l   Check   if  meter   indicates 18  to   30  volts   dc   when    starter switch is  pressed. Does   meter    indicate 18  to   30  voits   dc? m 7 u^OLON co _OM   OFL_CONT OD  o~ o 0 (CKT    14) ^r   ,.,1 BULKHEAD ELECTRICAL ; ! DISCONNECTS (ON i+ ,.i RIGHT BULKHEAD) ~ ( I I I CKT I BULKHEAD M ENGINE DISCONNECT DISCONNECT CONTACT 6 FOR   CLARITY QUADRANT ASSEMBLIES NOT    SHOWN ) l   inspect buikhead engine disconnect harness for   bent/ broken    connector contacts or ioose   CKT   14  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 buikhead engine    disconnect harness. l   Instail    front    accesaory harness connector at buikhead disconnect (page 10-270). m TA106798 4-109