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
HVAC Blower Motor Does
Test Step 9. Test A/C Compressor
Not Operate at One or More
Clutch for a Short Circuit.
Speeds - Continued
1. Disconnect chassis options wiring
harness connector (Figure 6,
Item 1) from A/C compressor
clutch (Figure 6, Item 2) (WP
0366).
2. Using a digital multimeter, mea-
Resistance 2.8 to 4.5 Ohms - Proceed
sure resistance between A/C com-
to Test Step 10.
pressor clutch wiring harness
Resistance Less Than 2.8 Ohms -
connector (WP 0007, Figure 152)
A/C compressor clutch is shorted.
terminal A and machine ground.
Replace A/C compressor (WP 0366).
Resistance should be 2.8 to 4.5
Install new blower fuse (TM 5-2420-
ohms.
231-10).
Proceed to Test Step 14.
Figure 6. A/C Compressor Clutch and Chassis Options Wiring Harness Connector.
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