TM 5-5420-226-20-1
Symptom-54
DETAILED
TROUBLESHOOTING
PROCEDURE
SUPPORT
SYSTEM
- FIRE EXTINGUISHER
FROM
STEP
(Continued)
o2
I
n
/
Check
front accessory
harness
(CKT 975A,
54A) for
continuity
from bulkhead
connector
to connector
at
fire extinguisher
relay.
~
WARNING
When
disconnected,
do
not
allow
battery
ground
straps
to come
into
contact
with any metal surface.
Second
Technician
(Front
of Crew
Compartment)
l
First
l
l
l
l
Disconnect
three
battery
ground
straps
(page
10-268).
Technician
(Commanders
Station)
Set multimeter
to OHMS
X I scale and zero
meter. or
use STE/ICE
Test
No. 91 (page
4-83).
Displace
front accessory
harness
connector
(CKT
54A)
from
bulkhead
disconnect
(page
10-269).
Disconnect
front accessory
harness
connector
from tire
extinguisher
rday.
Connect
black probe of meter
to contact
B (CKT 54A)
of front
accessory
harness
connector
at bulkhead
disconnect.
FOR CLARITY
QUADRANT
ASSEMBLIES
NOT SHOWN
FIRE EXTINGUISHER
RELAY
TA107263
4-574