. .  . TM 5-5420-226-20-1 Symptom-9 DETAILED TROUBLESHOOTING PROCEDURE FROM STEP VEHICLE OPERATION -  POWERPLANT, STARTING A (Continued) 36 I tyordeath.l WARNING Stay   clear   of   high   voltage ignition wires.  Contact   with  high  voltage   can G:RN’NG1 After disconnecting ground staps, do   not   allow   them    to   contact any —— I 1 Check   for  electrical   power   at  manifold   heater   spark  ‘ plug  connectors. First Technician (Operator’s Station) l   Set   MASTER BATTERY switch OFF. First Technician (Front of   Crew Compartment) l   Disconnect three battery ground straps (page 10-268). Second Technician (Commander’s Station) l   Install    battery slave    cable    connector at   bulkhead disconnect (page 10-270). First Technician (Front of   Crew Compartment) l   Connect three battery ground straps (page 10-268). Second Technician (Top Deck) l   Open   left   and   right   top    deck    grille   doors. l   Disconnect right and    left   manifold heater spark plug ignition wires and lay   loose    ends 1/4 inch    from vehicle ground. 9 ACCESS SPARK PLUG L ENGINE SHOWN r^o₀ b 8 =- 4 uuuu/ FOR   CLARITY QUADRANT ASSEMBLIES NOT   SHOWN — TA106934 4-245