TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 374 of 1275
TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED x. INSTRUMENT PANEL/PORTABLE INSTRUMENT (1) ONE OR MORE INSTRUMENT PANEL LIGHTS FAIL PANEL LIGHT CIRCUIT — CONTINUED TO OPERATE — CONTINUED CONTINUED FROM STEP A 1. Install inoperative panel light bulb (para 3. 4. 5. 6. 7. 8. 8-17). Disconnect battery ground leads. Disconnect portable instrument panel wiring harness from portable instrument panel disconnect. Place a jumper wire from socket C to pin C (lead 459) and from socket P to pin P (lead 459B). Place red lead of multimeters on pin J (lead 40) and black lead to ground. Reconnect battery ground leads. Turn MASTER and instrument panel light switches ON and check for voltage. Turn MASTER and instrument panel light switches OFF. Is voltage present? portable instrument panel wiring 3-274 CONTINUED ON NEXT PAGE harness (para 8-57).