TM 5-3810-306-20TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION72. CAB HEATER DOES NOT WORK WHEN SWITCH IS ONStep 1.Corroded or loose electrical connections at heatercontrol.a. Check wiring to heater. Clean and/or tightenelectrical connections.Step 2.Switch failure.a. Remove and test ON/OFF switch. If OK, do Step 3.b. Replace ON/OFF switch. (Refer to page 8-34.)Step 3.Operation indicator light blown.a. Replace lamp.73. CABHEATERSTARTSAFTERSWITCHINGONSEVERALTIMESStep 1.Fuel tank empty, fuel lines plugged.a. Fill fuel tank. (Refer to TM 5-3810-306-10.)b. Inspect in-line fuel filter. If clogged, replace.(Refer to page 15-32.)c. Check fuel lines for blockage or damage.d. If OK, do Step 2.Step 2.Defective heater or fuel (dosing) pump.a. Contact Direct Support Maintenance.3-52
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