TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 Change 2 3–81 g. CAB POWER SYSTEM — CONTINUED (1) ALL CAB ELECTRICAL COMPONENTS FAIL TO OPERATE. INITIAL SETUP Test Equipment Multimeter (item 6, Appx H) Tools Artillery and turret mechanic’s tool kit (SC 5180–95–CL–A12) References TM 9–2350–311–20–1 Equipment Condition Vehicle MASTER switch to ON (TM 9–2350–311–10) CAB POWER switch to OFF (TM 9–2350–311–10) 1. Place red multimeter lead to screw (use either of two screws) on bottom of contact arm assembly and black lead to ground. 2. Check for voltage. Is battery voltage present? 1. Place red multimeter lead to wire 47 terminal at the segment board and black lead to ground. 2. Check for voltage. Is battery voltage present? Go to step E. yes no Troubleshoot hull electrical system (TM 9–2350–311–20–1). A yes no B CONTINUED ON NEXT PAGE NOTE Steps B through D must be repeated for each contact arm assembly in contact with segment. CONTACT ARM ASSEMBLY WIRE 47 + – – + CONTACT ARM ASSEMBLY