TM 55-1520-240-T 16-216    Change 24       16-5.8  READY TO FIRE LIGHT DOES NOT COME ON (Continued)      16-5.8 DOES READY TO FIRE LAMP ILLUMINATE DURING PRESS TO TEST? NO YES REPAIR FAULTY CONDITION OF WIRE ALE47-014A22. NO YES DISCONNECT  PLUG 147P32/J1 FROM ALE- 47 J-BOX.  IS 28VDC PRESENT ON PLUG 147P32 PIN 3? NO YES NO YES DISCONNECT PLUG 147P4 FROM REMOTE BYPASS SWITCH PANEL.  IS 28VDC PRESENT ON PIN F? DISCONNECT  PLUG 147P33/J2 FROM ALE- 47 J-BOX.  IS 28VDC PRESENT ON PIN 21? IS CONTINUITY PRESENT BETWEEN 147P32 PIN 3 AND ALE-47 DCDU PLUG 147P30 PIN 11? GO TO TASK 16-5.6. REMOVE AND REPLACE FAULTY DCDU. REMOVE AND REPLACE FAULTY ALE-47 J-BOX. REPAIR/REPLACE FAULTY COMPONENT/ WIRING ON REMOTE BYPASS SWITCH PANEL. REPAIR OPEN CONDITION ON WIRE ALE-47-014D22. IS 28VDC PRESENT ON PLUG 147P30 PIN 2? TROUBLESHOOT NO. 1 28VDC BUS (TASK 9- 1.4). IS 28 VDC PRESENT ON CIRCUIT BREAKER SIDE OF ALE-47 DCDU CIRCUIT BREAKER? REMOVE AND REPLACE FAULTY ALE-47 DCDU CIRCUIT BREAKER. OPEN NO. 1 EAPS/MEAPS CB PANEL. IS 28VDC PRESENT ON BUS SIDE OF ALE-47 DCDU CIRCUIT BREAKER? YES NO NO NO YES YES YES REPAIR FAULTY CONDITION OF WIRES ALE47-003B22 OR ALE47-003A22. NO END OF TASK