SECTION V: TROUBLESHOOTINGTM 9-2350-256-20WARNINGRemove all jewelry such as rings, dogtags, bracelets, etc. If jewelry contactsa metal surface a direct short may resultin instant heating of tools, damage toequipment, and injury or death topersonnel.D Place red lead of multimeter on pin C of wire 478 andblack lead to ground. Turn MASTER and APU GENswitches ON, start APU, and check for voltage. TurnAPU and MASTER and APU GEN switches OFF. Ifvoltage is not present, replace regulator (see paragraph6-5). If voltage is present, go to step E.E Reconnect bulkhead to APU, master relay, and rigger'slights wiring harness to regulator. Disconnect enginegenerator relays to voltage regulator wiring harness atswitching relay box. Place red lead of multimeter insocket C of wire 478. Turn MASTER and APU GENswitches ON, start APU, and check for voltage. TurnAPU and MASTER and APU GEN switches OFF. Ifvoltage is not present, repair/replace wire 478 of enginegenerator relays to voltage regulator wiring harness (seeparagraph 6-81). If voltage is present, go to step F.F Place red lead of multimeter in socket D of wire 61/1.Turn MASTER and APU GEN switches ON, start APU,and check for voltage. Turn APU and MASTER andAPU GEN switches OFF. If voltage is not present,repair/replace wire 61/1 of engine generator relays tovoltage regulator wiring harness (see paragraph 6-81).If voltage is present, go to step G.2-149
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