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 206 of 828

TM 9–2350–311–20–2

3–94

Change 2

3–3

TROUBLESHOOTING

— CONTINUED

h.

CAB LIGHTING SYSTEM

— CONTINUED

(3)

M145/M145A1 TELESCOPE MOUNT AND

M117/M117A2 PANORAMIC TELESCOPE

LIGHTS ARE OUT, BUT ALL OTHER LIGHTS

OPERATE. — CONTINUED

Wiring in M145/M145A1

telescope mount is defec-

tive. Notify support mainte-

nance.

Verify fault is corrected.

Continue normal opera-

tions.

Replace lamp (para 18–3 for M145/M145A1

telescope mount or para 18–5 for M117/M117A2

panoramic telescope).

Does lamp light?

C

yes

no

CONTINUED FROM STEP B

END OF TASK