Blower Doesn;t Work - But Does!!

fauer · 05-31-2008, 02:20 PM

My 2005 Ford Focus heating/air blower doesn't work at all. The fuse is ok. I took out the blower, and put a ground and hot wire to the blower motor and it works.
I checked the wiring coming to the motor and one wire is hot, as long as the ignition is on, no matter what position the blower motor switch is on.
Even though that wire is hot, when I put the connector back on the blower motor, nothing happens.....even though my tester says their is juice coming to the connector, and when I hot wire the motor directly it runs. The connector seems to go right on to the leads to the motor, nothing in between...but it doesn't run. HOW CAN THIS BE??
The manual said something about a resistor.....but I can find nothing. It's only two fat wires to a connector...that plugs into two leads that carry the juice to the motor. Again, when I hot wire it....it works, When I plug in the connector that shows there is electric, there is nothing. HELP PLEASE!!

Bondo · 05-31-2008, 06:07 PM

Ayuh,.....

That's because Ford, in their Infinite Wisdom, runs the Power to the appliance,+ controls the said appliance by regulating the Ground......

When you start looking at it Assbackwards,.......... It makes Perfect Sense........

47_47 · 06-02-2008, 04:26 PM

Use a 12 volt test light (not a DVOM) between the terminals at the blower motor and the hot lead to a body ground. Take care not to spread the female ends.

Was this car in an accident? Check for pinched, nicked and corroded wires. With stranded and corroded wires it is possible for you to read voltage with a DVOM but will not operate a load (blower motor/test light) because you are not getting enough current.

skinnyj41004 · 06-02-2008, 05:31 PM

There is a resistor behind the glovebox on the blower housing. If you go to the dealer to get the part, which costs about $20, they should be able to print out a diagram of where the part is. I would almost bet you dinner that the blower will run on high the way it is now.