TM 5-5420-226-20-1 ( ( Symptom-39 DETAILED TROUBLESHOOTING PROCEDURE -“ INDICATOR -  GAGE {Continued) I . ‘Check CKT    30   or   CKT    31   for   continuity from FUEL TANKS selector switch to   proper fuel   tank    liquid quantity transmitter. Second Technician (Right or    Left    Top Deck Grille Doors) l l l First l l l Open top   deck    grille    doors to   gain    access to   fuel   tank liquid    quantity transmitter of  suspected circuit (left   fuel tank for   CKT 30,   right fuel    tank for   CKT 3 1). Disconnect rear    accessory harness connector from    fuel tank liquid quantity transmitter. Connect one   end    of  jumper wi[e    to   connector disconnected from   transmitter and   other    end   to  ground. Technician (Operator’s Station) Connect fuel    tanks selector switch cable    (CKT 28)   to FUEL TANKS selector switch. Connect red   probe of   meter to   connector of   suspected circuit (CKT 30   or   CKT 31 )  at   instrument panel and black probe to   ground. Check if  meter indicates continuity. Does    meter indicate continuity? l   Check    gage    instrument panel harness    (CKT   30  or  CKT  31)  for continuity from    connector at FUEL   TANKS selector switch to   gage    instrument panel connector. l   See   Step @ _.r^No REAR \ r ACCESSORY 1 HARNESS ) r!!-.!.l. ‘zJ L  FUEL    TANK R   FUEL    TANK LIQUID QUANTITY LIQUID QUANTITY TRANSMITTER TRANSMITTER ,* ,, -$^.  ,!0 0.(’ 0s’ 8 :: .. . 4 .- . 1,,, -.-’ 0 -n N TO   VEHICLE GROUND CKT   31 CKT   30 R   FUEL    TANK L  FUEL    TANK INSTRUMENT PANEL (REAR VIEW) TA107169 4-480