TM-9-2350-311-20-2
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS
DECEMBER 1993
TM-9-2350-311-20-2 - Page 223 of 828
TM 9–2350–311–20–2
3–111
A
B
C
D
E
F
G
H
J
K
L
M
N
P
CONTINUED FROM STEP H
yes
no
CONTINUED ON NEXT PAGE
Repair or replace wire 43
(TM 9–2350–311–20–1).
1.
Place one multimeter lead in socket N of
telephone intercom wiring harness connector and
other lead to ground.
2.
Check for continuity.
Is continuity present?
yes
no
I
Repair or replace wire
labeled GND (TM 9–2350–
311–20–1).
J
yes
no
Clean and adjust electrical
contact arm assembly
(para 9–3).
1.
Disconnect position 1 wires at contact arm
assembly quick-disconnects to place one
multimeter lead in position 1 and other lead to
position 2 terminals for individual continuity
checks.
POSITION 1
POSITION 2
Wire 141
Wire 41
Wire 142
Wire 42
Wire 143
Wire 43
2.
Check for continuity.
Is continuity present?
+
CONTACT ARM
ASSEMBLY
+
POSITION 1
POWER SYSTEM WIRING HARNESS
QUICK-DISCONNECTS
POSITION 2
TERMINALS
–
TELEPHONE/INTERCOM WIRING
HARNESS CONNECTOR SOCKET N
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