TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 118 of 1275
TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED b. MASTER RELAY CIRCUIT — CONTINUED (1) MASTER SWITCH INDICATOR LIGHT IS LIT Tools General mechanic’s tool kit (item 64, Appx H) Multimeter (item 36, Appx H) TA-1 probe kit (item 43, Appx H) Engine access doors open (TM 9-2350-311-1O) A 1. Disconnect lead 459 from master relay. 2. Place red lead of multimeter in lead 459 and black lead to ground. 3. Turn MASTER switch ON, and check for voltage. 4. Turn MASTER switch OFF. Is voltage present? Go to step E. B 1. Reconnect lead 459 to master relay. 2. Disconnect lead 81 from master relay. 3. Place red lead of multimeter in lead 81 and black lead to ground. 4. Turn MASTER switch ON, and check for voltage. 5. Turn MASTER switch OFF. Is voltage present? 3-18