TM  5-5420-226-20-1 -— Symptom-2 DETAILED TROUBLESHOOTING PROCEDURE VEHICLE OPERATION -  POWERPLANT, STARTING (Continued) T MASTER BATTERY SWITCH — / Check if  fuel    tanks electrical fuel    pumps are running. Second Technician (Operator’s Station) l l l First l l Set    MASTER BATTERY switch ON. Set    FUEL PUMPS switch ON. Listen for    sound of   right fuel    tank electrical fuel pump running. Technician (Rear Grille Doors) Open rear grille doors. Listen for    sound of   left    fuel    tank electrical fuel pump running. Are    both    fuel    tanks electrical fuel    pumps running? \ MASTER CONTROL PANEL RIGHT FUEL    PUMP FOR   CLARITY QUADRANT ASSEMBLIES NOT   SHOWN ) l   If   only    one    pump   is   not running, See    Symptom 5: ONE    ELECTRICAL FUEL PUMP    WILL NOT    WORK. l   If   both   pumps    are   not running, See   Symptom 6 BOTH ELECTRICAL FUEL PUMPS WILL _{NOT    WORK.}1 TA1068O8 — 4-119 .