ARMY TM 9-6115-670-14&P 5-78 5.26.  APU DC BOX WIRING HARNESS J3. This task covers:     a. Inspect b. Test c. Repair d. 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 MASTER ON-OFF switch on APU control unit set to OFF. Air filter removed (para 4.45.).   Materials/Parts Wiring Harness J-3 Strap, Tiedown, Elect. (Item 22, Appendix F) References: Figures FO-1 (SICPS/WIN-T) or F0-7 (JTACS) and FO-3 INSPECT Visually inspect for damaged wires or components. TEST a.  Remove four screws (JTACS), or slotted hex-head bolts (SICPS and WIN-T), flat and lock washers (1, Figure 5-19), and generator housing top cover (2). b.  Remove four screws (JTACS), or slotted hex-head bolts (SICPS and WIN-T), flat and lock washers (10), and generator housing side cover (11) (fuel transfer pump side). c.  Remove two screws, wing nuts and lock washers (JTACS), or four slotted hex-head bolts (SICPS and WIN-T), flat and lock washers (9), and generator housing side cover (8) (muffler side). d.  Refer to Table 5-1 and use a Multi-meter to test for continuity between pins at connector J3 (4) and corresponding leads. e.  If no continuity is found in one or more positions, repair or replace wiring harness. f.   Using a Multi-meter, test for continuity between each pin position and connector shell of J3 (4). g.  If continuity is found in one or more pin positions, repair or replace wiring harness. 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. NOTE Disconnect test leads one at a time.  Reconnect after testing.