TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 398 of 1275
TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED aa. PERSONNEL VENTILATION BLOWER CIRCUIT — PERSONNEL VENTILATION BLOWER FAILS TO CONTINUED OPERATE — CONTINUED CONTINUED FROM STEP C D 1. Reconnect accessory control box-to-heater/ blower wiring harness to ventilation blower. . 2. Disconnect accessory control box-to-heater/ blower wiring harness from accessory control box. 3. Place a jumper wire from socket B (lead 159B) to ground. 4. Place red lead of multimeters in socket A (lead 159A) and black lead to ground. 5. Turn MASTER switch ON, VENTILATOR BLOWER switch in EXHAUST position and check for voltage. 6. Place VENTILATOR BLOWER switch in INTAKE position and check for voltage. 7. Turn MASTER and VENTILATOR BLOWER switches OFF. Is voltage present? Go to step G. E 1. With connections and VENTILATOR BLOWER switch in positions where voltage was obtained in step D, move black lead of multimeters to socket C (lead 159C). 2. Turn MASTER switch ON and check for voltage. 3. Turn MASTER switch OFF. Is voltage present? CONTINUED ON NEXT PAGE 3-298