Dodge ZB 2005 Service Manual page 1615

HEATING & A/C
*BLOWER MOTOR SPEEDS INCORRECT —
TEST
4 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Blower Motor Resistor Block harness connector.
Measure the voltage of each of the Blower Motor Driver circuits (cavities 2, 3, 7, and
10).
Is there any voltage present?
Yes → Repair all Blower Motor Driver circuits with voltage present for a
→ Go To 5
No
5 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 the Low Blower Motor Driver circuit and the M1,
M2, and Blower Motor High Driver circuit.
Measure the resistance between the M1 Blower Motor Driver circuit and the M2 and
Blower Motor High Driver circuit.
Measure the resistance between the M2 Blower Motor Driver circuit and the Blower
Motor High Driver circuit.
Is the resistance below 10K ohms between any of the circuits?
Yes → Repair the Blower Motor Driver circuits with a resistance below
→ Replace the A/C - Heater Control Module in accordance with the
No
6 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 of each Blower Motor Driver circuit between the Blower
Motor Resistor Block harness connector and the A/C - Heater Control Module C1
harness connector.
Is the resistance below 5.0 ohms on each of the circuits?
Yes → Replace the Blower Motor Resistor Block in accordance with the
→ Repair all Blower Motor Driver circuits with a resistance above 5
No
ACTION
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
10K ohms for a short to each other.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.
Continued
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APPLICABILITY
All
All
All