Blower Motor Speeds Incorrect - Dodge ZB 2005 Service Manual

Symptom:

*BLOWER MOTOR SPEEDS INCORRECT

BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO GROUND
A/C - HEATER CONTROL MODULE
BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO VOLTAGE
BLOWER MOTOR DRIVER CIRCUITS SHORTED TOGETHER
A/C - HEATER CONTROL MODULE - SPEEDS INCORRECT
BLOWER MOTOR DRIVER CIRCUIT(S) OPEN
BLOWER MOTOR RESISTOR BLOCK - OPEN SPEED
TEST
1 Turn the Blower control to the Off position.
Turn the ignition on.
Does the blower run?
Yes → Go To 2
→ Go To 3
No
2 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Blower Motor Resistor Block harness connector.
Measure the resistance between ground and each of the Blower Motor Driver circuits.
Is the resistance below 10K ohms on any of the circuits?
Yes → Repair all Blower Motor Driver circuits with a resistance below
→ Replace the A/C - Heater Control Module in accordance with the
No
3 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Turn the ignition on.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Using a 12-volt test light connected to ground, back probe each of the Blower Motor
Driver circuits (cavities 2, 3, 7, and 10) in the A/C - Heater Control Module C1
harness connector.
Does the test light illuminate brightly on each circuit?
Yes → Go To 4
→ Go To 6
No
POSSIBLE CAUSES
ACTION
10K ohms for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
233
HEATING & A/C
APPLICABILITY
All
All
All