TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TOUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
74. NO CAB HEATER IGNITION VOLTAGE
Step 1.
Corroded or loose electrical connections at heater
control.
a. Check wiring to heater. Clean and/or tighten
electrical connections.
Step 2.
Electrical connections (wiring) mixed.
a. Check wiring connections. If installed properly, do
Step 3.
b. Remove and properly install electrical connections.
Step 3.
Switch failure.
a. Remove and test ON/OFF switch. If OK, do Step 4.
(Refer to page 8-34.)
b. Replace ON/OFF switch.
Step 4.
Defective heater.
a. Contact Direct Support Maintenance.
75. CAB HEATER MOTOR DOES NOT START
Step 1.
Corroded or loose electrical connections to heater
control.
a. Check wiring to heater. Clean and/or tighten
electrical connections.
Step 2.
Heater 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.
Defective heater.
a. Contact Direct Support Maintenance.
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