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 heating of 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 J of wire493 and black lead to ground. Turn MASTER APUFUEL SHUTOFF switches ON, and check for voltage.Turn MASTER and APU FUEL SHUTOFF switchesOFF. If voltage is present, go to step L. If voltage isnot present, go to step F.2-185
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