TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 276 of 1275
TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED n. ALTERNATOR CIRCUIT (M109A4/M109A5) — ALTERNATOR FAILS TO CHARGE BATTERIES; GAGE CONTINUED INDICATION: NOT CHARGING, UNSTEADY OR INACCURATE READING — CONTINUED CONTINUED FROM STEP I J 1. Reconnect powerplant wiring harness to rectifier. . 2. Disconnect rectifier-to-voltage regulator wiring harness from rectifier. 3. Place jumper wires from pin E (lead 3) to a battery negative terminal and pin B (lead 1 ) to positive terminal of same battery to apply 12 Vdc to alternator field. 4. Turn MASTER switch ON and run vehicle engine at 1000 rpm. 5. Set multimeter on dc scale and place red lead of multimeter on pin C (lead 2A) and black lead to ground. 6. Check for voltage. 7. Turn MASTER switch and engine OFF. Is voltage above 27.5 Vdc? Replace rectifier (para 8-5) ‘CONTINUED ON NEXT PAGE 3-176