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
3. Using a digital multimeter, mea-
HVAC Blower Motor Does
Resistance 5.0 Ohms or Less -
sure resistance between side con-
Not Operate at One or More
Proceed to step 4.
sole wiring harness connector (WP
Speeds - Continued
Resistance Greater Than 5.0 Ohms -
0007, Figure 24) terminal N6 and
Replace side console wiring harness
side console wiring harness con-
(WP 0170).
nector (WP 0007, Figure 145) 12-
Install blower fan switch (WP 0172).
volt supply terminal. Resistance
Proceed to Test Step 14.
should be 5.0 ohms or less.
4. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from front main chassis wir-
ing harness connector (WP 0007,
Figure 6) (WP 0162).
5. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between front
Replace front console wiring harness
main chassis wiring harness con-
(WP 0162).
nector (WP 0007, Figure 6) termi-
Install blower fan switch (WP 0172).
nal N6 and rear main chassis
Proceed to Test Step 14.
wiring harness connector (WP
Resistance Greater Than 5.0 Ohms -
0007, Figure 25) terminal N6.
Replace main chassis wiring harness
Resistance should be 5.0 ohms or
(WP 0170).
less.
Install blower fan switch (WP 0172).
Proceed to Test Step 14.
0031-11