TM 5-3805-293-23-2
0022
Table 1. Cab Heating, Air Conditioning, and 12 Volt Power Inverter Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
N OT E
3. Blower Motor Does Not
Turn On In One or More
Always inspect the harness connectorsthat 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 a
connection is found, correct the problem and verify that this diagnostic
code is Active before performing this procedure.
Perform open or short circuit test ateach harness connection to identify
correct harness to replace.
Perform this test only if condition is active.
Test Step 1. Test Operator Climate
Controller
1. Turn battery disconnect switch
and ignition switch to the ON
position (TM 5-3805-293-10)
2. Rotate fan speed switch through
HVAC Blower Motor Turns ON In
each position (TM 5-3805-293-10)
Each Speed - Troubleshooting com-
and verify HVAC blower turns on
plete.
in each position.
HVAC Blower Motor Does Not Turn
ON In Any Speed - Proceed to Test
Step 2.
HVAC Blower Motor Does Not Turn
On In Low, Medium, and Medium
High Speed - Replace blower resistor
(WP 0294).
HVAC Blower Motor Does Not Turn
On In Low Speed Only - Proceed to
Test Step 3.
HVAC Blower Motor Does Not Turn
On In Medium Speed - Proceed to
Test Step 4.
HVAC Blower Motor Does Not Turn
On In Medium High Speed - Proceed
to Test Step 5.
HVAC Blower Motor Does Not Turn
On In High Speed - Proceed to Test
Step 6.
Test Step 2. Test Climate Control
Panel Voltage and Ground Circuits.
1. Turn ignition switch and battery
disconnect to the OFF position
(TM 5-3805-293-10).
0022-15