TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED h. FLAME HEATER CIRCUIT (ENGINE MODEL FLAME HEATER DOES NOT OPERATE — CONTINUED 7083-7396) — CONTINUED 1. Reconnect hose to pump and motor assembly. 2. If air box heater, fuel solenoid, and pump and motor assembly all failed to operate, go to step Q. 3. If air box heater and pump and motor assembly both failed to operate, go to step L 4. If only air box heater failed to operate, go to step E. 5. If only pump and motor assembly failed to operate, go to step G. 6. If only fuel solenoid failed to operate, go to step L. 1. Disconnect lead 486 from flame heater ignition coil assembly. 2. Place red lead of multimeters on pin A (lead 486) and black lead to ground. 3. Turn MASTER switch ON and check for voltage. 4. Turn MASTER switch OFF. Is voltage present? Replace flame heater ignition coil assembly (para 5-10). 3-108