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Heater blower motor

(2005 Ford Taurus)
in Chicago Ridge, IL on December 09, 2009
The blower motor has quit working on my 2005 Ford Taurus, subsequently there's no heat! Is this a common problem for this vehicle? About how much will it cost to have it replaced?
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Popular Answer
on December 09, 2009
Customer Concern: The blower motor is inoperative.
Tests/Procedures: 1. Check for power to the blower motor on the Pink/White (PK/WH) wire with the ignition switch in the Run position.

2. If there is no power to the blower motor on the PK/WH wire, check Fuse 28 (10 amp) and fuse 08 (40 amp) of the Central Junction Box (CJB) for a blown, missing, or poorly connected fuse.

3. If the fuses are OK, remove the blower motor relay and verify that two terminals indicate battery voltage with the key on. Terminal 86 of the relay is supplied a ground from the control switch.

4. Install a jumper between terminal 30 and 87. If the blower motor starts to work, terminal 85 of the relay shows power and terminal 86 indicates to be a ground, replace the blower motor relay.

5. If power is present at the blower motor on both circuits with the blower motor connected, access the blower motor resistor located close to the blower motor and verify that the Black (BK) wire indicates to be a ground.

6. If the BK wire indicates a good ground but all or some of the other circuits indicate battery voltage, the blower motor resistor is defective.

7. If there is a presence of water at the resistor, refer to TSB 04-15-3 to seal water away from the blower motor and resistor area.
Potential Causes: Defective Blower Motor
Defective Blower Motor Relay
Blower Motor Resistor
Burnt Fuse
Switch Circuit

Tech Tips: Technical Service Bulletin (TSB) 04-15-3 relates to a water leak in the cowl area, which allows water entry into the heater case and will result in the loss of some or all of the blower motor function.
Wiring diagrams are different for manual control or automatic climate control. For cars with manual heater controls look for a blown 10 amp and 40 amp fuse that powers the blower motor relay. With the key on blower motor controls set to on the white/pink wire at the blower motor should have 12volts, if it doesn't the problem is "before" the motor ie fuse relay, wiring or switch. If you have power there, ground the orange /black wire if it doesn't make the blower motor spin the motor is bad, if grounding black/orange makes the blower motor spin the blower resistor pack is probably bad. There is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You get a one year subscription to year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual.
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