Table 1. Heating, Ventilation, and A/C (HVAC) Blower Motor Does Not
Operate at One or More Speeds - Continued.
TEST OR INSPECTION
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.
Blower fuse is open.
Proceed to Test Step 9.
Figure 2. Blower Fan Switch.