TM 5-2420-231-23-1
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Table 1. Heating, Ventilation, and A/C (HVAC) Blower Motor Does Not
Operate at One or More Speeds - Continued.
031
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Resistance 5.0 Ohms or Less - Blower
5. Using a digital multimeter, mea-
HVAC Blower Motor Does
fuse is OK.
sure resistance between fuse ter-
Not Operate at One or More
Install blower fuse (TM 5-2420-231-10).
minals. Resistance should be 5.0
Speeds - Continued
Proceed to Test Step 2.
ohms or less.
Resistance Greater Than 5.0 Ohms -
Blower fuse is open.
Proceed to Test Step 9.
Figure 2. Blower Fan Switch.
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