TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 388 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED z. PERSONNEL HEATER CIRCUIT — CONTINUED (1) PERSONNEL HEATER FAILS TO OPERATE — CONTINUED CONTINUED FROM STEP B I D 1. Disconnect battery ground leads. 2. Place a jumper wire from pin A to socket A (lead 400). 3. Place red lead of multimeters in socket C (lead 402) and black lead to ground. 4. Turn MASTER switch ON, HEAT SELECTOR switch to LOW and check for voltage. 5. Turn MASTER and HEAT SELECTOR switches OFF. Is voltage present? E 1. Reconnect accessory control box-to-heater/ blower wiring harness to accessory control box. 2. Disconnect lead 10 of power lead wiring harness from accessory control box. 3. Place red lead of multimeters in lead 10 and black lead to ground. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. Is voltage present? Troubleshoot master relay circuit CONTINUED ON NEXT PAGE 3-288 (para 3-3b).