TM 1-1520-238-T-7 Change 5 10–188.1 10–66A. PILOT GREEN FUEL XFR INDICATOR IS NOT LIGHTED WITH PILOT 10–66A TRANS SWITCH SET AT TO AFT (ADB) 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 1-1520-238-23 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. Check for 28VDC at P429–A18. Is voltage present? YES Go to step 2. NO Go to step 6. 2. Check for open between (A402): XK5–9–X1 and J23–A18, XK5–9–X2 and TB3–33–C, XK5–9–A1 and J23–A15, XK5–9–A2 and TB3–33–A, TB3–33–B and GS8–D. Does open exist? YES Repair open wire. Go to paragraph 10–47. NO Go to step 3. 3. Check for open between P429–A15 and P174–B7. Does open exist? YES Repair open wire. Go to paragraph 10–47. NO Go to step 4. 4. Check open for between (A131): J1–B7 and J2–A10. Does open exist? YES Replace pilot FUEL panel (TM 1-1520-238-23). NO Go to step 5. 5. Check open for between: P179–A10 and P18–93. Does open exist? YES Repair open wire between: P179–A10 and J914–A11, P914–A11 and P18–93. Go to paragraph 10–47. NO Replace relay (A402)K5–9 (TM 1-1520-238-23). 6. Check open for between P429–A18 and P174–B8. Does open exist? YES Repair open wire. Go to paragraph 10–47. NO Replace pilot FUEL panel (TM 1-1520-238-23). END OF TASK