Chrysler 300M 2002 Service Manual page 2044

Symptom:
*ATC BLOWER MOTOR INOPERATIVE
OPEN JUNCTION BLOCK FUSE
FUSED IGNITION SWITCH OUTPUT SHORT TO GROUND
BLOWER MOTOR SHORT TO GROUND
BLOWER MOTOR POWER MODULE SHORT TO GROUND
GROUND CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
BLOWER MOTOR CONTROL CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
BLOWER MOTOR OPERATION
BLOWER MOTOR POWER MODULE OPEN
TEST
1 Turn the ignition off.
Remove and inspect the Blower Motor Fuse #23 in the Junction Block.
Is the fuse open?
Yes → Go To 2
→ Go To 5
No
2 Turn the ignition off.
Replace the Junction Block Fuse #23.
Turn the ignition on.
Operate the blower motor in all speeds.
Start the engine and operate the ATC system in all modes and speeds.
Recheck the fuse.
Did the fuse open again?
Yes → Go To 3
→ Refer to the wiring diagrams located in the service information to
No
3 Turn the ignition off.
Disconnect the Blower Motor Power Module harness connector.
Measure the resistance between ground and the Fused Ignition Switch Output
circuit in the Blower Motor Power Module connector.
Is the resistance below 5.0 ohms?
Yes → Repair the Fused Ignition Switch Output circuit for a short to
→ Go To 4
No
POSSIBLE CAUSES
ACTION
help isolate a possible intermittent short to ground condition.
Perform BODY VERIFICATION TEST - VER 1.
ground and replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
321
HEATING & A/C
APPLICABILITY
All
All
All