TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 322 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED r. ENGINE OIL PRESSURE GAGE CIRCUIT — ENGINE OIL PRESSURE INDICATOR FAILS TO CONTINUED OPERATE WITH ENGINE RUNNING; ALL OTHER INSTRUMENTS OPERATE — CONTINUED CONTINUED FROM STEP C I D 1. Reconnect lead 27 to ENGINE OIL PRESSURE gage. 2. Disconnect battery ground leads. 3. Disconnect portable instrument panel wiring harness from portable instrument panel disconnect. 4. Place a jumper wire from socket P (lead 459B) to socket C (lead 459). 5. Place red lead of multimeters in socket A (lead 27) and black lead to ground. 6. Reconnect battery ground leads. 7. Turn MASTER switch ON and check for voltage. 8. Turn MASTER switch OFF. Is voltage present? 1 Repair or replace lead 27 from ‘ portable instrument panel wiring harness to ENGINE OIL PRESSURE indicator (para 8-57). 1 CONTINUED ON NEXT PAGE 3-222