TM 1-1520-238-T-7 10–233 10–87. FUEL FILL CIRCUIT BREAKER – DOES NOT STAY CLOSED WITH LVL CONT 10–87 VALVES SWITCHES SET TO OPEN (cont) 8. Remove relay (A402)XK3–4 (TM 1-1520-238-23). Check for short between (A402)J31–A4 and ground. Does short exist? YES Repair shorted wire between (A402): J31–A4 and K3–4–X1. Go to paragraph 10–76. NO Replace relay (A402)XK3–4 (TM 1-1520-238-23). 9. Check for short between P260–11 and ground. Does short exist? YES Go to step 10. NO Go to step 11. 10. Detach P251. Check for short between P260–11 and ground. Does short exist? YES Repair shorted wire between P260–11 and P251–1. Go to paragraph 10–76. NO Replace fuel transfer shutoff valve (TM 1-1520-238-23). 11. Check for short between P260–10 and ground. Does short exist? YES Go to step 12. NO Go to step 13. 12. Detach P251. Check for short between P260–10 and ground. Does short exist? YES Repair shorted wire between P260–10 and P251–4. Go to paragraph 10–76. NO Replace fuel transfer shutoff valve (TM 1-1520-238-23). 13. Check for short between P260–4 and ground. Does short exist? YES Go to step 14. NO Go to step 16. 14. Detach P400. Check for short between P260–4 and ground. Does short exist? YES Go to step 15. NO Replace SDC (TM 1-1520-238-23). 15. Detach P440 and P444. Check for short between: P260–4 and ground, P400–36 and ground. Does short exist? YES Repair shorted wire between: P260–4 and P444–B16, P400–36 and P440–A20. Go to paragraph 10–76. NO Repair shorted wire between (A402): J16–A20 and TB2–32–M, J31–B16 and TB2–32–L. Go to paragraph 10–76. 16. Attach positive meter lead to (L48)J1–1 and check for short to ground. Does short exist? YES Repair shorted wire between P260–16 and P1068–1. Go to paragraph 10–76. NO Replace fuel vent shutoff valve (TM 1-1520-238-23). END OF TASK