TM 5-2420-231-23-1
0031
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
7. Turn A/C temperature switch (Fig-
HVAC Blower Motor Does
ure 9, Item 1) to the coldest setting
Not Operate at One or More
(TM 5-2420-231-10).
Speeds - Continued
Figure 9. A/C Temperature Switch.
0031
8. Using a digital multimeter, test for
Continuity - Replace side options
continuity between side options
wiring harness (WP 0255).
wiring harness connector (WP
Install blower fan switch (WP 0172).
0007, Figure 43) terminal B and
Install new blower fuse (TM 5-2420-
machine ground. There should be
231-10).
no continuity.
Proceed to Test Step 14.
No Continuity - Proceed to step 9.
9. Using a digital multimeter, test for
Continuity - Replace side options
continuity between side options
wiring harness (WP 0255).
wiring harness connector (WP
Install blower fan switch (WP 0172).
0007, Figure 43) terminal C and
Install new blower fuse (TM 5-2420-
machine ground. There should be
231-10).
no continuity.
Proceed to Test Step 14.
No Continuity - Proceed to step 10.
10. Using a digital multimeter, test for
Continuity - Replace side options
continuity between side options
wiring harness (WP 0255).
wiring harness connector (WP
Install blower fan switch (WP 0172).
0007, Figure 43) terminal E and
Install new blower fuse (TM 5-2420-
machine ground. There should be
231-10).
no continuity.
Proceed to Test Step 14.
No Continuity - Proceed to step 11.
