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 195 of 828
TM 9–2350–311–20–2
3–83
1.
Turn MASTER switch to OFF.
2.
Reconnect wire 100 to quick-disconnect at
gunner’s selector switch box assembly.
3.
Disconnect J2 harness connector of gunner’s
selector switch box assembly.
4.
Turn MASTER switch to ON.
5.
Place red multimeter lead at socket P of J2
harness connector and black lead to ground.
6.
Check for voltage.
Is battery voltage present?
Replace wire 100 from
gunner’s selector switch
box assembly to quick-dis-
connect (para 8–7).
Replace wire 100 from con-
tact arm assembly to quick-
disconnect (para 8–4).
1.
Turn MASTER switch to OFF.
2.
Disconnect wire 100 from quick-disconnect at
gunner’s selector switch box assembly.
3.
Turn MASTER switch to ON.
4.
Place red multimeter lead in wire 100
quick-disconnect leading to contact arm
assembly and black lead to ground.
5.
Check for voltage.
Is battery voltage present?
E
CONTINUED FROM STEP B
yes
no
F
yes
no
CONTINUED ON NEXT PAGE
–
+
–
+
J2 CONNECTOR
HARNESS
SOCKET P
WIRE 100
GUNNER’S
SELECTOR
SWITCH BOX
ASSEMBLY
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