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
11. Using a digital multimeter, test for
HVAC Blower Motor Does
Continuity - Replace side options
continuity between side options
Not Operate at One or More
wiring harness (WP 0255).
wiring harness connector (WP
Speeds - Continued
Install blower fan switch (WP 0172).
0007, Figure 43) terminal A 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 12.
12. Using a digital multimeter, test for
Continuity - Replace chassis options
continuity between chassis options
wiring harness (WP 0171).
wiring harness connector (WP
Install blower fan switch (WP 0172).
0007, Figure 42) terminal A 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 13.
13. Remove air cleaner barrier curtain
(WP 0099).
14. Disconnect chassis options wiring
harness connector (WP 0007, Fig-
ure 136) from front console options
wiring harness connector (WP
0007, Figure 135) (WP 0163).
15. Using a digital multimeter, test for
Continuity - Replace front console
continuity between front console
options wiring harness (WP 0163).
options wiring harness connector
Install blower fan switch (WP 0172).
(WP 0007, Figure 135) terminal B
Install rear instrument panel right-side
and machine ground. There should
cover (WP 0176).
be no continuity.
Install new blower fuse (TM 5-2420-
231-10).
Proceed to Test Step 14.
No Continuity - Proceed to step 16.
16. Remove instrument panel front
cover (WP 0174).
17. Disconnect A/C pressure relay
(WP 0007, Figure 53) from front
console options wiring harness
connector (WP 0007, Figure 52).
18. Using a digital multimeter, test for
Continuity - Replace front console
continuity between front console
options wiring harness (WP 0163).
options wiring harness connector
Install blower fan switch (WP 0172).
(WP 0006, Figure 135) terminal C
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 - Proceed to step 19.
0031-19
