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 153 of 828

TM 9–2350–311–20–2

3–42

3–3

TROUBLESHOOTING CHART — CONTINUED

c.

CAB TRAVERSING SYSTEM — CONTINUED

(3)

CAB TRAVERSES UNDER POWER, BUT

TRAVERSE CONTROL INDICATOR LAMP

DOES NOT LIGHT. – CONTINUED

Repair ground circuit from

terminal 1 of TRAVERSE

CONTROL indicator light

(para 8–12).

1.

Turn CAB POWER, MASTER, and TRAVERSE

CONTROL switches to OFF.

2.

If necessary, open gunner’s selector switch box

assembly.

3.

Place one multimeter lead on terminal 1 of

TRAVERSE CONTROL indicator light and other

lead to ground.

4.

Check for continuity.

Is continuity present?

C

yes

no

CONTINUED FROM STEP A OR B

END OF TASK

–

+

TERMINAL

TRAVERSE

CONTROL

INDICATOR

LIGHT

Replace TRAVERSE CON-

TROL indicator light (para

8–12).

GUNNER’S

SELECTOR

SWITCH BOX

ASSEMBLY