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 152 of 828
TM 9–2350–311–20–2
3–41
c.
CAB TRAVERSING SYSTEM — CONTINUED
(3)
CAB TRAVERSES UNDER POWER, BUT
TRAVERSE CONTROL INDICATOR LAMP
DOES NOT LIGHT.
INITIAL SETUP
Test Equipment
Multimeter (item 6, Appx H)
Tools
Artillery and turret mechanic’s tool kit
(SC 5180–95–CL–A12)
Equipment Condition
Vehicle MASTER switch to ON (TM 9–2350–311–10)
CAB POWER switch to ON (TM 9–2350–311–10)
Replace TRAVERSE
CONTROL indicator light
(para 8–12).
yes
no
1.
Turn MASTER and CAB POWER switches to
OFF.
2.
Open gunner’s selector switch box assembly.
3.
Turn CAB POWER, MASTER, and TRAVERSE
CONTROL switches to ON.
4.
Place red multimeter lead on terminal 2 of
TRAVERSE CONTROL indicator light and black
lead to ground.
5.
Check for voltage.
Is battery voltage present?
Replace indicator lamp
(para 8–12). If malfunction
persists, go to step C.
Push “press to test” TRAVERSE CONTROL indicator
light.
Does indicator light illuminate?
A
yes
no
B
CONTINUED ON NEXT PAGE
TRAVERSE
CONTROL
INDICATOR
LIGHT
TRAVERSE CONTROL
INDICATOR LIGHT
–
+
GUNNER’S
SELECTOR
SWITCH BOX
ASSEMBLY
TERMINAL
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