TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 416 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED ac. WINTERIZATION KIT CIRCUIT — CONTINUED (1) COOLANT HEATER FAILS TO OPERATE – CONTINUED CONTINUED FROM STEP C m D 1. Reconnect bulkhead-to-coolant heater control box wiring harness to heater control box. 2. Disconnect battery ground leads. 3. Disconnect bulkhead-to-coolant heater control box wiring harness from driver’s bulkhead. 4. Place red lead of muitimeter in socket C (lead 403C) and black lead to ground. 5. Reconnect battery ground leads. 6. Turn MASTER switch ON, heater control switch to start, and check for voltage. 7. Turn MASTER and heater control switches OFF. Is voltage present? I I Repair or replace lead 403C bulkhead- to-coolant heater control box wiring harness (para 14-8). Repair or replace lead 403C of coolant heater-to-bulkhead wiring harness (para 14-8). END OF TASK 3-316