TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–82 Change 2 3–3 TROUBLESHOOTING — CONTINUED g. CAB POWER SYSTEM — CONTINUED (1) ALL CAB ELECTRICAL COMPONENTS FAIL TO OPERATE. — CONTINUED Repair electrical contact arm assembly (para 9–3). Verify fault is corrected. Continue normal opera- tions. 1. Turn MASTER switch to OFF. 2. Inspect electrical contact brushes for wear and adjust contact arm assembly (para 9–3). 3. Turn MASTER switch to ON. 4. Place red multimeter lead to screw (use either of two screws) on bottom of contact arm assembly and black lead to ground. 5. Check for voltage. Is battery voltage present? 1. Check ground strap attaching cap screws for proper connection. 2. Place red multimeter lead to screw (use either of two screws) on bottom of contact arm assembly and black lead to ground. 3. Check for voltage. Is battery voltage present? yes no Verify fault is corrected. Continue normal opera- tions. If malfunction per- sists, go to step E. C yes no D CONTINUED ON NEXT PAGE CONTINUED FROM STEP B GROUND STRAP CONNECTION – + CONTACT ARM ASSEMBLY