TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
38. HEATER WILL NOT OPERATE WITH SWITCH IN HIGH POSITION (LOW POSITION OPERATION NORMAL)
Step 1. Place battery to OFF position.
Step 2. Disconnect lead 5C from heater switch.
Step 3. Place battery switch to ON position.
Step 4. Set multimeter to 50-volt range.
Step 5. Connect multimeter negative lead to vehicle chassis ground and positive lead to
lead 5C. Multimeter should indicate 12-13 volts.
a. If battery voltage is not indicated, perform malfunction 27, test 1.
b. If battery voltage is indicated, replace defective heater switch (para. 3-107).
END OF TESTING!
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