Chrysler Town and Country 2003 Owner's Manual page 608

HEATING & A/C
*REAR BLOWER MOTOR SPEEDS INCORRECT - MTC —
TEST
3 Turn the ignition off.
Disconnect the Rear Blower Front Control Switch harness connector.
Disconnect the Rear Blower Rear Control Switch C1 harness connector.
Measure the resistance between ground and each of the Rear Blower Motor Driver
circuits (Low, Medium, and High) in the Rear Blower Front Control Switch harness
connector.
Is the resistance below 10K ohms on any of the circuits?
Yes → Repair all Rear Blower Motor Driver circuits with a resistance
→ Replace the A/C - Heater Control Module in accordance with the
No
4 Turn the Rear Blower switch on the A/C - Heater Control Module off.
Turn the Power switch on the A/C - Heater Control Module off.
Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C1 harness connector.
Turn the ignition on.
Turn the Power switch on the A/C - Heater Control Module on.
Turn the Rear Blower switch on the A/C - Heater Control Module to the Low,
Medium, and High speed positions while listening for the rear blower motor to
change speed accordingly.
Does the rear blower speed change accordingly?
Yes → Replace the Rear Blower Rear Control Switch in accordance with
→ Go To 5
No
5 Turn the Power switch on the A/C - Heater Control Module off.
Turn the ignition off.
Disconnect the Rear Blower Front Control Switch harness connector.
Disconnect the Rear Blower Rear Control Switch C1 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 connect to ground, back probe each of the Rear Blower
Motor Driver circuits (Low, Medium, and High) in the Rear Blower Front Control
Switch harness connector and in the Rear Blower Rear Control Switch C1 harness
connector.
Does the test light illuminate brightly on each circuit?
Yes → Go To 6
→ Go To 10
No
ACTION
below 10K ohms for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
584
Continued
APPLICABILITY
All
All
All