TM 5-3805-296-23-2
0134
Table 1. Blower Motor Does Not Operate in One or More Speeds.
0134
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Blower Motor Does Not
Operate in One or More
Always inspect harness connectors that are involved in the circuit. Poor
Speeds
connections can often be the cause of a problem in an electrical circuit.
Verify that all connections in the circuit are clean and secure and that all
connections are in good condition. If a problem with the connection is
found, correct the problem and verify that this malfunction or diagnostic
code is active before performing this procedure.
Perform open or short-circuit test at each harness connection to identify
the correct harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
Test Step 1. Test Blower Operation.
1. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
2. Turn fan speed switch to position I,
Blower Does Not Operate In Any
II, III, and IIII (TM 5-3805-296-10)
Speed Proceed to Test Step 2.
and test output of blower.
Blower Does Not Operate in Speed (I)
Only Proceed to Test Step 26.
Blower Does Not Operate in Speed
(II) Only Proceed to Test Step 30.
Blower Does Not Operate in Speed
(III) Only Proceed to Test Step 34.
Blower Only Operates in Speed IIII
Replace blower resistor (WP 0456).
Proceed to Test Step 38.
Test Step 2. Inspect Blower Circuit
Breaker.
1. Turn fan speed switch to
position O (TM 5-3805-296-10).
2. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
3. Inspect blower circuit breaker in
Circuit Breaker Not Tripped
circuit breaker panel
Proceed to Test Step 3.
(TM 5-3805-296-10).
Circuit Breaker Tripped Reset
blower circuit breaker
(TM 5-3805-296-10).
Proceed to Test Step 12.
Test Step 3. Test Voltage to Blower
Motor.
1. Remove interior cab air filter
(TM 5-3805-296-10).
