SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
WARNING
Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry contacts a metal
surface a direct short may result in instant
heating of tools, damage to equipment, and
injury or death to personnel.
J Disconnect GND lead from warning horn assembly.
Place red lead of multimeter in GND lead and
black lead to ground. Check for continuity. If
continuity is not present, replace warning horn
assembly (see paragraph 6-21). If continuity is
present, repair/replace warning horn ground lead
(see paragraph 6-21).
K Reconnect gage panel to bulkhead wiring harness to
warning horn relay. Open air inlet doors.
Disconnect bulkhead to engine bracket and rear fuel
tank transmitter wiring harness from bulkhead
disconnect. Place red lead of multimeter in socket H
of wire 509 and black lead to ground. Turn MASTER
switch on, start engine, set to idle, and check for
voltage. Turn engine and MASTER switch OFF. If
voltage is present, go to step L. If voltage is not
present, repair/replace wire 509 of gage panel to
bulkhead wiring harness (see paragraph 6-45 for
dual voltage; 6-46 for single voltage).
L Reconnect gage panel to bulkhead wiring harness to
bulkhead disconnect. Remove engine deck (see
paragraph 9-51). Disconnect bulkhead to engine
bracket and rear fuel tank transmitter wiring
harness from engine disconnect. Place a jumper wire
from pin M to socket M. Place red lead of
multimeter in socket N of wire 509 and black lead to
ground. Turn MASTER switch on, start engine, set to
idle, and check for voltage. Turn engine and
MASTER switch OFF. If voltage is present, go to
step M. If voltage is not present, repair/replace
wire 509 of bulkhead to engine bracket and rear fuel
tank transmitter wiring harness (see paragraph
6-73 for dual voltage; 6-74 for single voltage).
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