ARMY TM 9-6115-670-14&P 4-95 4.36.  BATTERY CHARGING ALTERNATOR. This task covers: a.  Test b.  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 Vehicle engine not running. MASTER ON-OFF switch on APU control unit set to OFF. Fan guard, fan shroud, and shroud housing removed (para 4.18.). Materials/Parts Battery Charging Alternator Strap, Tiedown, Elect. (Item 22, Appendix F) TEST a.  Refer to Figure FO-1 (SICPS/WIN-T) or F0-7 (JTACS) and tag and remove connector lead AF (2, Figure 4-24) from battery charging alternator (1). b.  Pull back protective cover and remove nut and washer (5) securing lead ALT (4) to alternator (1). Tag and remove lead (4). c.  Start APU (para 2.5.). d.  Using a multimeter, connect positive lead to alternator lead ALT (3) and negative lead to ground. e.  Measure voltage reading. If alternator voltage reading is below 20 VAC, or there is no reading, alternator is faulty. f.   Stop APU (para 2.6.) and replace alternator. REPLACE WARNING Ensure that APU DC power supply is disconnected.   Failure to observe this warning could result in severe injury or DEATH to personnel. WARNING Ensure that the APU is turned off and completely de- energized before opening generator housing.  Failure to observe this warning could result in severe injury or DEATH to personnel.