38. FAN RUNS CONTINUALLY WITH SWITCH OFF; RUN LAMP STAYS ON; NO HEAT PRODUCED

36. WINTERIZATION KIT HEATERS WITERIZATION KIT HEATERS WILL NOT START Step 1. Perform Electrical Troubleshooting malfunction #22. SMOKY HEATER EXHAUST AFTER 5 MINUTES CONTINUOUS OPERATION

42. VIBRATES

/.25ton/TM-9-2320-289-20 CUCV Series Trucks at Unit level Manual
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TM 9-2320-289-20 Table 2-3. Mechanical Troubleshooting (Con’t) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION WARNING Diesel fuel is flammable. When disconnecting fuel lines to test fuel flow, direct fuel spray away from source of ignition. A fire extinguisher must be on hand in work area. Failure to follow this warning may result in serious injury or death to personnel. Step 3. If troubleshooting cargo compartment heater malfunction, remove heater cover. Disconnect fuel line from inlet side of heater. Place a suitable container under inlet line. Check for fuel flow to heater while holding run-start switch in “START” position (all except engine coolant heater) or on-off switch in “ON” position (engine coolant heater only). If fuel flow is evident, replace heater, (See paragraph 11-8 or 11-21) If fuel flow is not evident, perform step 4. Step 4. Check for restrictions in heater inlet fuel line. If line is restricted, clear restrictions. Step 5. Perform Electrical Troubleshooting malfunction #22. HEATER (ENGINE COOLANT ONLY) 38. FAN RUNS CONTINUALLY WITH SWITCH OFF; RUN LAMP STAYS ON; NO HEAT PRODUCED Step 1. Replace heater. (See paragraph 11-16) 39. HEATER OPERATES; ENGINE REMAINS COLD Step 1. Check to see if coolant shutoff valves are open. Step 2. Replace 40. WILL NOT START Step 1. Perform heater. (See paragraph 11-16) Electrical Troubleshooting malfunction #22. 2-50

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