TM 1-1520-238-T-7 Change 1 10–225 10–80. AFT FUEL QTY INDICATOR – DOES NOT INDICATE AFT FUEL LOAD WITH 10–80 FUEL QUANTITY SWITCH SET TO IND ON Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Personnel Required: 68X Armament/Electrical Systems Repairer One person to assist References: TM 1-1520-238-T-4 TM 1-1520-238-23 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provision – R160 door open TM 1-1520-238-T-4 Maintenance headset connected WARNING Turn off power before detaching or attaching wires and connectors. High current 28 VDC or 115 VAC is present. Failure to do so could result in death or serious injury. 1. On refueling panel press each PRESS TO TEST indicator. Do indicators light when pressed? YES Go to step 2. NO Go to paragraph 10–78 to troubleshoot REFUEL VALVE OPEN indicator. 2. Check for 28 VDC at (A402)J16–A20. Is voltage present? YES Go to step 3. NO Go to step 6. 3. Check for open between (A402)J31–B16 and P915–A5. Does open exist? YES Repair open wire between: (A402)J31–B16 and (A402)TB2–32–L, (A402)TB–32–M and (A402)J16–A20, P440–A20 and P915–A5. Go to paragraph 10–76. NO Go to step 4. 4. Check for 5 VDC at P260–13 while assistant presses bit TEST button on FSC. Is voltage present? YES Go to step 5. NO Go to paragraph 10–48 to perform fuel quantity system capacitance and indicating test. 5. Check for open between P260–14 and P260–15. Does open exist? YES Replace refueling panel (TM 1-1520-238-23). NO Repair open wire between: P260–14 and GS361–A, P260–15 and GS361–B. Go to paragraph 10–76. 6. Check for open between (A402)J16–A20 and P260–4. Does open exist? YES Repair open wire between P260–4 and P444–B16. Go to paragraph 10–76. NO Replace refueling panel (TM 1-1520-238-23). END OF TASK