TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 390 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 G I 2. 3. 4. 5. Reconnect lead 400A to circuit breaker output. Disconnect lead 400A from HEAT SELECTOR switch. Place red lead of multimeter in lead 400A and black lead to ground. Turn MASTER switch ON and check for voltage. Turn MASTER switch OFF. I Is voltage present? 1. 2. 3. 4. 5. 6. 7. 1 I Reconnect lead 400A to HEAT SELECTOR switch. Disconnect both leads 402 from HEAT SELECTOR switch terminals. Place red lead of multimeter on HIGH terminal and black lead to ground. Turn MASTER switch ON, HEAT SELECTOR switch to HIGH and check for voltage. Place red lead of multimeter on LOW terminal and black lead to ground. Turn MASTER switch ON, HEAT SELECTOR switch to HIGH and check for voltage. Turn MASTER and HEAT SELECTOR switches OFF. Is voltage present in both positions? • Replace heat selector switch (para 8-20). I I 1 CONTINUED ON NEXT PAGE 3-290