Front Blower Motor Speeds Incorrect - Mtc - Chrysler Town and Country 2003 Owner's Manual

Symptom:

*FRONT BLOWER MOTOR SPEEDS INCORRECT - MTC

BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO GROUND
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 ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Disconnect the Front Blower Motor Resistor Block C1 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
→ Go To 2
No
2 Turn the ignition off.
Ensure that the Front Blower Motor Resistor Block C1 harness connector is
connected to the Front Blower Motor Resistor Block.
Disconnect the A/C - Heater Control Module C2 harness connector.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module 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, 5, 9, and 10).
Does the test light illuminate brightly on each circuit?
Yes → Go To 3
→ Go To 5
No
3 Turn the Power switch on the A/C - Heater Control Module off.
Turn the ignition off.
Disconnect the A/C - Heater Control Module C2 harness connector.
Disconnect the Front Blower Motor Resistor Block C1 harness connector.
Turn the ignition on.
Measure the voltage of each of the Blower Motor Driver circuits (cavities 2, 3, 5, 9,
and 10) in the A/C - Heater Control Module C2 harness connector.
Is there any voltage present?
Yes → Repair all Blower Motor Driver circuits with voltage present for a
→ Go To 4
No
POSSIBLE CAUSES
ACTION
10K ohms for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
573
HEATING & A/C
APPLICABILITY
All
All
All