CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
ENGINE FUEL SHUTOFF SOLENOID- -Continued
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.
C Reconnect wire 54A of switch panel to head lamps and
bulkhead wiring harness to fire extinguisher interlock
switch. Disconnect wire 54A on output side of fire
extinguisher interlock switch from connector. Place red
lead of multimeter in wire 54A and black lead to ground.
Turn MASTER switch on, release fire extinguisher
interlock switch, and check for voltage. Turn MASTER
and fire extinguisher interlock switches OFF. If voltage is
present, reconnect wire 54A on output side of fire
extinguisher interlock switch to connector and, go to step
D. If voltage is not present, repair/replace fire
extinguisher interlock switch assembly (see paragraph 6-
16).
D Reconnect switch panel to neutral safety to bulkhead
wiring harness to main switch panel. Install main switch
panel (5), flat washer (4), ground lead (3), three
lockwashers (2), and three screws (1) to mounting
brackets. Open air inlet doors (TM 9-2350-256-10).
Disconnect bulkhead to engine wiring harness and starter
relay wiring harness from bulkhead. Place red lead of
multimeter on pin D of wire 54 and black lead to ground.
Turn MASTER and ENGINE FUEL SHUTOFF switches
on, and check for voltage. Turn MASTER and ENGINE
FUEL SHUTOFF switches OFF. If voltage is present, go
to step E. If voltage is not present, repair/replace wire 54
of switch panel to neutral safety to bulkhead wiring
harness (see paragraph 6-54).
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