SECTION V: TROUBLESHOOTINGTM 9-2350-256-20WARNINGRemove all jewelry such as rings, dogtags, bracelets, etc. If jewelry contacts ametal surface a direct short may result ininstant heatingof tools, damage toequipment, and injury or death topersonnel.ERemove four nuts (6), four lockwashers (7), and fourscrews (8) and release APU control box (9) frommounting bracket. Place a jumper wire from pin N tosocket N. Place red lead of multimeter on pin K of wire420A and black lead to ground. Turn MASTER andAPU FUEL SHUTOFF switches ON, and check forvoltage. Turn MASTER and APU FUEL SHUTOFFswitches OFF. If voltage is present, go to step L. Ifvoltage is not present, go to step F.2-177
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