SECTION V: TROUBLESHOOTINGTM 9-2350-256-20WARNINGRemove all jewelry such as rings, dog tags,bracelets, etc. If jewelry contacts a metalsurface a direct short may result in instantheating of tools, damage to equipment, andinjury or death to personnel.D Reconnect APU control box to foot dimmer switchand bulkhead wiring harness to bulkhead. Removeengine deck (see paragraph 9-51). Disconnectbulkhead to engine bracket and rear fuel tanktransmitter wiring harness from engine disconnect.Place red lead of multimeter on pin M of wire 26 andblack lead to ground. Turn MASTER switch on, startengine, set to idle, and check for voltage. Turnengine and MASTER switch OFF. If voltage ispresent, go to step E. If voltage is not present, go tostep F.E Reconnect bulkhead to engine bracket and rear fueltank transmitter wiring harness to enginedisconnect. Disconnect wire 26 of bulkhead to APU,master relay, and rigger's lights wiring harnessfrom bulkhead to engine bracket and rear fuel tanktransmitter wiring harness. Place red lead ofmultimeter in female connector of wire 26 and blacklead to ground. Turn MASTER switch on, startengine, set to idle, and check for voltage. Turnengine and MASTER switch OFF. If voltage ispresent, repair/replace wire 26 of bulkhead toAPU, master relay, and rigger's lights wiringharness (see paragraph 6-75 for dual voltage; 6-76for single voltage). If voltage is not present,repair/replace wire 26 of bulkhead to enginebracket and rear fuel tank transmitter wiringharness (see paragraph 6-73 for dual voltage; 6-74for single voltage).F Remove powerplant (see paragraph 3-1). Place redlead of multimeter on pin M of wire 26 and blacklead of multimeter on wire 26. Check for continuity.If continuity is present, replace generator (seeparagraph 6-1). If continuity is not present,repair/replace wire 26 of engine wiring harness (seeparagraph 6-58 for dual voltage; 6-59 for singlevoltage).2-215
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