Blower Motor Inoperative - Dodge ZB 2005 Service Manual

HEATING & A/C
Symptom:

*BLOWER MOTOR INOPERATIVE

POWER DISTRIBUTION CENTER FUSE #1
BLOWER MOTOR RELAY SHORTED TO GROUND
BLOWER MOTOR RELAY OUTPUT CIRCUIT SHORTED TO GROUND
BLOWER MOTOR SHORTED TO GROUND
BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN
GROUND CIRCUIT OPEN
A/C - HEATER CONTROL MODULE OPEN
CHECKING BLOWER MOTOR RELAY AND RELAY CIRCUITS
BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN
BLOWER MOTOR
TEST
1 Turn the ignition off.
Remove and inspect Power Distribution Center Fuse #1.
Is the fuse open?
Yes → Go To 2
→ Go To 5
No
2 Turn the ignition off.
Replace the Power Distribution Center Fuse #1.
Turn the ignition on.
Turn the blower on and operate it in all speeds and modes.
Does the blower motor operate properly without blowing the fuse?
Yes → Check the Blower Motor Relay Output circuit for an intermittent
→ Go To 3
No
3 Turn the ignition off.
Remove Blower Motor Relay from the Power Distribution Center.
Measure the resistance between the Blower Motor Relay terminal 29 and terminal
28.
Measure the resistance between the Blower Motor Relay terminal 29 and terminal
26.
Is the resistance below 10K ohms?
Yes → Replace the Blower Motor Relay and fuse in accordance with
→ Go To 4
No
POSSIBLE CAUSES
ACTION
short to ground. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
230
APPLICABILITY
All
All
All