What do you need to know about the blower control module?

Basics Of Troubleshooting The Blower Control Module. The blower control module is a solid state device unlike the old style blower motor resistors that actually use resistors. It controls blower motor speed by varying the voltage it sends to the blower motor.

How does the blower control module in GM 3.8L work?

You can find this tutorial in Spanish here: Cómo Probar El Módulo del Motor del Soplador (3.8L GM) (at: autotecnico-online.com ). The blower control module is a solid state device unlike the old style blower motor resistors that actually use resistors. It controls blower motor speed by varying the voltage it sends to the blower motor.

Where is the blower motor resistor located on a car?

It’s located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.

How is the speed of the blower motor controlled?

The electronic module that controls the speed of the blower motor is called a blower motor control module. In some cars, the blower motor has only 4 or 5 fixed speeds. In this case, the speed of the blower motor is controlled by a blower motor resistor.

How does the a / C heater control module work?

It controls blower motor speed by varying the voltage it sends to the blower motor. Depending on what blower speed is selected from the A/C-Heater control panel, this voltage can range between 0 and 12 volts.

How does the voltage affect the blower motor?

This varying voltage signal is the blower motor speed signal that tells it what blower speed you’ve just selected on the A/C-Heater control panel. The blower control module then translates this blower motor speed signal from the A/C-Heater control panel signal and applies the corresponding voltage directly to the blower motor. Empty.

How to replace blower motor module 02-09 Chevy Trailblazer?

Learn how to replace the blower motor module in your 02-09 Chevy Trailblazer with this video from 1A Auto. Remove the two 7 mm bolts securing the plastic cover under the passenger side dash. Unclip the wiring from the panel. Open the glove compartment and pull the hook up releasing the glove compartment.

How to test the blower control module ( GM 3.8L )?

Basics Of Troubleshooting The Blower Control Module. TEST 1: Verifying The Blower Control Module Is Getting Battery Power And Ground. TEST 2: Bypassing the Blower Control Module. TEST 3: Verifying The Blower Speed Voltage Signal. Where To Buy The Blower Control Module And Save. More 3.8L GM Tutorials.

On climate control systems without automatic temperature controls, the blower motor speeds are controlled by a switch wired to a stepped resistor that usually includes a thermal fuse.

What are the symptoms of a worn out blower motor?

One of the symptoms of a worn out blower motor is that it can intermittently produce a loud screeching noise when running. How to test a blower motor? If the blower motor doesn’t work at all, the blower motor itself must be tested first. Typically it’s done by measuring the voltage at the blower motor connector when it’s turned on.

Where does the ground go in a Honda blower motor?

The blower motor control module (Honda calls it Power Transistor) supplies the ground. The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor.

How does the blower motor work on a Honda Accord?

Typically it can be activated by pressing and holding different buttons. Testing Honda power transistor (blower motor control module). For example, in the 2009 Honda Accord, the service manual describes the procedure as follows: Turn the ignition to ON.

Where does the power transistor go in a blower motor?

The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor. The service manual advises measuring the voltage at the blower motor, then if not OK, at the power transistor and so on.

How do you change the blower control module?

Disconnect the cable from the bottom of the core. Be careful not to move the core too much, since the AC is still connected. The blower control module needs to be slid to the drivers side to unlock it. Then pull it towards the fire wall and rotate it, it should now be free to drop it down the back.

How to troubleshoot the blower control module GM 3.8L?

Where can I find blower motor speed control?

It was under 412-01 Climate Control – Blower Motor Speed Control. From there it will link you to all the relevant sections. There are also some good exploded views that you should have handy.

What happens when the blower speed control goes bad?

When the controller goes bad it will default to high fan speed and can not be changed using the buttons. Vehicle used is a 2009 F-150 but it is the same for other years for the F-150 and Expedition with ATC. Vehicles with manual temperature control will need a different part. Loading…

How do you plug in a blower motor?

Insert the new resistor and bolt into place with your 7/32 in socket and ratchet. Plug in the wiring, both to the resistor and the blower motor. Test your AC/heat fan to make sure itâ€™s working properly. Close the glove box. Bolt the plastic cover back into place with your 7 mm socket and ratchet.

What kind of motor does a blower motor use?

Used for controlling your blower motor’s fan speed, Genteq ECM motor modules are known for their efficiency and durability. You can program your module and effectively control the speed of your fan, extending its lifetime.

Where can I buy a blower motor module?

Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout. Learn how to replace the blower motor module in your 02-09 Chevy Trailblazer with this video from 1A Auto.

What kind of motor does a blower fan use?

We carry a large selection of HVAC blower motor modules in many types and at variable speeds. Our motor control modules are high-functioning, cost-effective, and quality-made. Used for controlling your blower motor’s fan speed, Genteq ECM motor modules are known for their efficiency and durability.

How is the speed of the blower motor determined?

The Blower Motor is a part of your car’s climate control system that forces the air through the vents into the passenger cabin. The fan is controlled through switches on the dashboard. The speed of the fan is determined by means of the blower motor resistor. The blower motor is usually fitted in the AC duct near the evaporator or the heater core.

When to replace a faulty blower motor in a car?

You should replace a faulty blower motor at the earliest to prevent your car’s heating/cooling system from failing. At Buy Auto Parts we stock a wide variety of blower motors for every car make and model. We have genuine OEM replacements and premium aftermarket parts.

What do you need to know about the blower control module?