TM 5-3805-298-23-1
0119
Table 1. Blower Motor Does Not Operate in One or More Speeds.
0119
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Blower Motor Does Not
Operate in One or More
Always inspect wiring harness connectors that are involved in the circuit.
Speeds
Poor 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 wiring harness connection to
identify the correct wiring harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
Test Step 1. Test Fan Operation.
1. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-298-10).
2. Turn heater A/C switch to A/C ON
position (TM 5-3805-298-10).
3. Turn blower switch to I, II, and III
Fan Operates in One or More
Speeds - Proceed to Test Step 2.
(TM 5-3805-298-10) and test
output of blower fan.
Fan Does Not Operate in Any
Speed - Proceed to Test Step 3.
Test Step 2. Test Heater A/C Switch
in Heater Position.
1. Turn heater A/C switch to heater
ON position (TM 5-3805-298-10).
2. Turn blower switch to I, II, and III
Fan Operates in One or More
(TM 5-3805-298-10) and test
Speeds - Proceed to Test Step 10.
output of blower fan.
Fan Does Not Operate in Any
Speed - Proceed to Test Step 8.
Test Step 3. Test Heater A/C Switch
in Heater Position.
1. Turn heater A/C switch to heater
ON position (TM 5-3805-298-10).
2. Turn blower switch to I, II, and III
Fan Operates in One or More
Speeds - Proceed to Test Step 9.
(TM 5-3805-298-10) and test
output of blower fan.
Fan Does Not Operate in Any
Speed - Proceed to Test Step 4.
