TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 284 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED o. ENGINE WATER TEMP INDICATOR CIRCUIT — (1) ENGINE WATER TEMP INDICATOR NEEDLE FAILS CONTINUED TO MOVE OR IS UNSTEADY; ALL OTHER GAGES OPERATE PROPERLY INITIAL SETUP Tools Personnel Required General mechanic’s tool kit (item 64, Appx H) Two Multimeter (item 36, APPX H) TA-1 probe kit (item 43, APPX H) . . Equipment Conditions (Long test leads may be needed for some tests; Engine access door open (TM 9-2350-311-10) 16 AWG wire maybe used as an extension.) Transmission access doors open (TM 9-2350-311-10) Portable instrument panel cover removed (para 8-17) 1. Disconnect lead 33A from engine coolant temperature transmitter. 2. Turn MASTER switch ON and check ENGINE WATER TEMP gage for a reading. 3. If ENGINE WATER TEMP gage shows a minimum reading, place a jumper wire from lead 33A to ground. 4. Check ENGINE WATER TEMP gage for reading. 5. Turn MASTER switch OFF. Does ENGINE WATER TEMP gage show minimum when not grounded, and maximum when grounded? I transmitter (para 8-6). Replace engine coolant temperature CONTINUED ON NEXT PAGE 3-184