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2005 cc precedent won't move. At first would buck then go. Now wont move. Replaced MCOR,put high speed motor magnet in. The magnet cracked upon install. Still doing the same thing before new parts.

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The new one you bought if its secound hand might be dead

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You mentioned nothing regarding the ignition system (cap rotor, wires coil)...checked those?

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SOURCE: 2005 Jeep Liberty Heater fan motor speed control

Sounds like low speed coil in the Blower Fan resistor block has failed. The Blower Fan Resistor Block is usually located in the air ducting adjacent to the Blower Fan. The Resistor Block consists of 3 or 4 coils of special resistance wire attached to terminals which connect to the wiring that comes from the fan switch and then to the Blower Fan. The block is on the output side of the fan unit so that the airflow from the fan past the coils inside the duct assists in preventing them from overheating and burning out.
Access to the Resistor Block is from under the dash. To replace, remove the multi-pin connector and then undo the screws holding in the block. Check air duct for leaves and dirt which may have caused the coils to fail. .Replacement is the reverse procedure

Posted on Nov 27, 2010

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SOURCE: Heater motor speed control. only

You'll need to replace the blower motor resistor. It controls the current to the lower speeds and it is mounted in the blower housing.


Posted on Feb 07, 2011

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The diagram is a little hard to follow, but it looks like on the high fan relay there are 5 circuits like on the hi-low relay.
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