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
19. Using a digital multimeter, test for
HVAC Blower Motor Does
Continuity - Replace front console
continuity between front console
Not Operate at One or More
options wiring harness (WP 0163).
options wiring harness connector
Speeds - Continued
Install blower fan switch (WP 0172).
(WP 0007, Figure 135) terminal D
Connect side options wiring harness
and machine ground. There should
(WP 0007, Figure 43) to chassis options
be no continuity.
wiring harness (WP 0007, Figure 42).
Install rear instrument panel right-side
cover (WP 0176).
Install new blower fuse (TM 5-2420-
231-10).
Proceed to Test Step 14.
No Continuity - Replace A/C pressure
relay (WP 0007, Figure 53).
Test Step 14. Verify That Symptom Is
Resolved.
1. Connect all wiring harness con-
nectors.
2. Connect batteries (WP 0157).
3. Turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
4. Turn blower fan switch (Figure 10,
HVAC Blower Motor Operates at
Each Speed Setting - Proceed to step
Item 1) to each speed setting (TM
5.
5-2420-231-10) and verify that
HVAC blower motor turns on.
HVAC Blower Motor Does Not
Operate at One or More Speeds -
Repeat troubleshooting from the
beginning.
0031-20