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 208 of 828

TM 9–2350–311–20–2

3–96

Change 2

3–3

TROUBLESHOOTING

— CONTINUED

h.

CAB LIGHTING SYSTEM

— CONTINUED

(4)

M15 ELEVATION QUADRANT LIGHT IS OUT,

BUT ALL OTHER LIGHTS OPERATE. — CON-

TINUED

Verify fault is corrected.

Continue normal opera-

tions.

Replace LED (para 18–6).

Does lamp light?

yes

no

CONTINUED FROM STEP B

END OF TASK

C

Wiring in M15 quadrant is

defective. Notify support

maintenance.