ARMY TM 9-6115-670-14&P 4-160 4.63.   INDICATOR LAMPS. This task covers: Replace INITIAL SETUP Tools General Mechanic's Tool Kit (Item 1, Appendix B) Shop Equipment, Electrical Repair,   Semitrailer Mounted (Item 3, Appendix B) Equipment Conditions APU control unit disconnected from shelter. Materials/Parts Indicator Lamps REPLACE a.  Remove ten screws (caged nuts (SICPS), machine screws (JTACS and WIN-T)) (1, Figure 4-51) securing APU control unit front cover to chassis and remove cover. b.  At the rear of indicator light (3), identify and tag terminal leads (4). c.  Identify terminal lead at rear of indicator light leading to terminal lead at rear of ENGINE START/PRE-HEAT switch. d.  Carefully cut away insulation sleeving and expose soldered connection. Desolder connection. e.  Identify second terminal lead at rear of indicator light connecting to terminal lead at APU connector. f.   Carefully cut away insulation sleeving and expose soldered connection.  Use soldering iron to unsolder connection. g.  At rear of indicator light, tuck in plastic wings (2) and gently pull indicator light (3) forward through front panel. NOTES Terminal leads for indicator lamps in APU control units configured  for  the  SICPS  system  are  installed  into terminal board TB1.   Refer   to   fold-out   FO-1   (SICPS/WIN-T)   or   F0-7 (JTACS), then loosen appropriate screws in terminal board TB1 to remove or install indicator lamp leads. SICPS personnel may skip steps c through f, and i through p.