TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED ad. PARKING BRAKE WARNING LIGHT CIRCUIT — PARKING BRAKE WARNING LIGHT FAILS TO OPERATE CONTINUED — CONTINUED CONTINUED FROM STEP C 1. Reconnect lead 509E to PARKING BRAKE warning light. 2. Disconnect lead 10 from circuit breaker input. 3. Place red lead of multimeter in lead 10 and black lead to ground. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. I Is voltage present? I I I Troubleshoot master relay circuit (para 3-3b). 1. Reconnect lead 10 from circuit breaker input. 2. Disconnect lead 450 from circuit breaker output. 3. Place red lead of multimeter in circuit breaker output and black lead to ground. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. Is voltage present? I I Replace circuit breaker (para 8-33, , CONTINUED ON NEXT PAGE 3-322 E M109A2/M109A3;8-34, M109A4 M109A5).