TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 294 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED o. ENGINE WATER TEMP INDICATOR CIRCUIT — (2) ENGINE LOW LEVEL COOLANT LIGHT FAILS TO CONTINUED LIGHT WHEN PRESSED-TO-TEST; ALL OTHER LIGHTS OPERATE CONTINUED FROM STEP F 1. 2. 3. 4. 5. Reconnect lead 27 to COOLANT indicator light. Disconnect lead 27 from circuit breaker output. Place red lead of multimeter in circuit breaker output and black lead to ground. Turn MASTER switch ON and check for voltage. Turn MASTER switch OFF. Is voltage present? I 1. Reconnect lead 27 to circuit breaker output. 2. Disconnect portable instrument panel wiring harness from portable instrument panel bracket. 3. Place a jumper wire from socket P (lead 4596) to socket C (lead 459). 4. Place red lead of multimeter in socket A (lead 27). 5. Turn MASTER switch ON and check for voltage. 6. Turn MASTER switch OFF. Is voltage present? CONTINUED ON NEXT PAGE 3-194