Where is blower motor resistor

The blower motor resistor is responsible for controlling the blower motor speed. In the past, this was done by varying the voltage supplied to the blower motor. In newer applications, the blower motor resistor is actually a solid state module that sends a varied signal to the blower motor. The traditional blower motor resistor is connected to ground and wired in series with the blower motor assembly.

Blower motor resistors have several resistors with different resistances. This controls the current that runs through the blower motor. Each fan speed selection is connected to one or more of the resistors in the blower resistor assembly.

The change in resistance controls the current through the blower motor, which in turn limits the speed that the blower motor spins at. When high speed is requested, the blower motor resistor is bypassed and the blower motor ground circuit is connected directly to ground. Step 5 : Reinstall the glove box door.

Stay Cool! Jeffrey N. Previous Post. Next article. You may also like. Not many cars Leave a reply Cancel reply Your email address will not be published. More in Car Care Advice. You will realize that it is actually an easy task that can be accomplished even without being a trained mechanic. First, gather the tools and materials that will be needed for the replacement of the blower motor resistor, which will include the following:.

Here are the simple steps that you have to follow for the easy replacement of a blower motor resistor:. Obviously, the first thing that you have to do is to determine the location of the blower motor resistor so that you know which component will be removed.

It is located right next to the blower motor. The latter, on the other hand, can be commonly found underneath the dash on the passenger side or in the engine compartment. Now that you know the location of the blower motor resistor, remove it. You will need to first remove the components around the blower motor resistor, which include the pigtail connected to the AC and the blower motor cooling duct.

At this point, you can now have easy access to the blower motor resistor. Now, all that you have to do is to unscrew the bolts that secure the blower motor resistor in place. Use a ratchet with a short extension. Once the bolts are out, all that you have to do is to pull the blower motor resistor.

After pulling the blower motor resistor, you have to cut off the wires that are connected to the component. Cut the wires using the stripper or scissors that are made specifically to cut through wires. Before you proceed with the installation, apply dielectric grease to the housing of the blower motor resistor. This will prevent water from getting inside, which is a common problem when you are off-road driving. Apply coating around the plastic, which will provide a sort of sealing to protect the component.

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