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TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download

Page 198 of 828

TM 9–2350–311–20–2 3–86 3–3 TROUBLESHOOTING — CONTINUED g. CAB POWER SYSTEM — CONTINUED (2) CAB ELECTRICAL COMPONENTS OPERATE NORMALLY, BUT CAB POWER INDICATOR LIGHT DOES NOT ILLUMINATE. 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 CAB POWER in- dicator 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 and MASTER switches to ON. 4. Place red multimeter lead on terminal 2 of CAB POWER 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” CAB POWER indicator light. Does indicator light illuminate? A yes no B CONTINUED ON NEXT PAGE CAB POWER INDICATOR LIGHT – + TERMINAL CAB POWER INDICATOR LIGHT