TM 9-2350-256-20-1
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Troubleshooting Procedure
Fire Extinguisher Engine Shutoff Light
Symptom
Fire extinguisher engine shutoff light malfunctioning.
Malfunction
Fire extinguisher engine shutoff light fails to operate while fuel shutoff switch operates normally. Do steps 1 thru
5.
CORRECTIVE ACTION
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.
1.
Disconnect wire 54B of flasher system panel wiring harness from connector at fire extinguisher
interlock switch. Place red lead of multimeter on pin of connector and black lead to ground. Turn
MASTER and FUEL SHUTOFF switches on and check for voltage. Turn MASTER and FUEL
SHUTOFF switches OFF. If voltage is present, go to step 2. If voltage is not present, go to step 5.
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