CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
FIRE EXTINGUISHER ENGINE SHUTOFF LIGHT--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.
D
Reconnect wire 54B of flasher system panel wiring
harness to diode lead assembly connector. Disconnect
wire 54B/GND of diode assembly from connector.
Place red lead of multimeter on pin of connector and
black lead to ground. Turn MASTER and FUEL
SHUTOFF switches OFF. If voltage is present,
repair/replace wire 54B/GND of diode lead assembly
from connector to GND (see paragraph 6-89). If
voltage is not present, repair/replace connector of
diode lead assembly (see paragraph 6-89).
E
Reconnect wire 54B of flasher system panel wiring
harness to connector at fire extinguisher interlock
switch. Disconnect flasher system panel wiring
harness Y-connector from wire 54A of fire extinguisher
interlock switch assembly. Place red lead of
multimeter in wire 54A and black lead to ground. Turn
MASTER and FUEL SHUTOFF switches ON, release
fire extinguisher interlock switch and check for voltage.
Turn MASTER, FUEL SHUTOFF, and fire extinguisher
interlock switches OFF. If voltage is present, replace
connector of flasher system panel wiring harness (see
paragraph 6-48). If voltage is not present, troubleshoot
fuel shutoff solenoid circuit.
2-88