TM 1-1520-238-T-7 10–242 Change 1 10–94. FUEL FILL CIRCUIT BREAKER – DOES NOT STAY CLOSED WITH LVL CONT 10–94 VALVES SWITCHES SET TO CLOSE (cont) 9. Check for short between P179–B1 and ground. Does short exist? YES Go to step 10. NO Go to step 11. 10. Detach P1066. Check for short between P179–B1 and ground. Does short exist? YES Repair shorted wire between: P179–B1 and J914–B17, P914–B17 and P1066–1. Go to paragraph 10–76. NO Replace forward fuel isolation switch (TM 1-1520-238-23). 11. Detach P179. Attach positive meter lead to P260–1 and check for short to ground. Does short exist? YES Go to step 12. NO Go to step 15. 12. Detach P440. Check for short between P260–1 and ground. Does short exist? YES Go to step 13. NO Go to step 14. 13. Detach P441 and P444. Check for short between: P179–B2 and ground, P260–1 and ground. Does short exist? YES Repair shorted wire between: P179–B2 and P441–B18, P260–1 and P444–A6. Go to paragraph 10–76. NO Repair shorted wire between (A402): J24–B18 and TB2–11–C, J31–A6 and TB2–11–B, J16–B13 and TB2–11–A. Go to paragraph 10–76. 14. Detach P942. Check for short between P440–B13 and ground. Does short exist? YES Repair shorted wire between P942–1 and P440–B13. Go to paragraph 10–76. NO Replace forward fuel cell fuel level control pilot valve (TM 1-1520-238-23). 15. Detach P440. Check for short between P260–9 and ground. Does short exist? YES Go to step 17. NO Go to step 16. 16. Detach P1066 and check for short between P440–B19 and ground. Does short exist? YES Repair shorted wire between P440–B19 and P1066–2. Go to paragraph 10–76. NO Replace forward fuel isolation switch (TM 1-1520-238-23). 17. Detach P429, P444 and P440. Check for short between: P179–B3 and ground, P260–9 and ground. Does short exist? YES Repair shorted wire between: P179–B3 and P429–A20, P260–9 and P444–A3. Go to paragraph 10–76. NO Repair shorted wire between (A402): J23–A20 and TB2–11–G, J31–A3 and TB2–11–F, J16–B19 and TB2–11–E. Go to paragraph 10–76. END OF TASK