Why does my GM blower motor not turn on?
In many cases it’s a problem with the GM blower motor module. The most common complaint when this part fails is the motor will not turn on at all. However, it’s also possible for the blower motor to have speed control issues or continue running at all times even with the ignition off.
What does Black Wire mean on GM blower?
The black wire should indicate a strong ground. If you have a good ground and verified power into the module, yet have no electricity flowing to the fan you probably have a bad module.In many cases when I find the problem with the GM blower control module I also find signs of moisture in the heater case that contains the motor and module.
Where does the air come from in a GM blower?
As an example, if you select defrost, the mode door points all the air at the windshield. If you select heat, then the air will be directed at the floorboards. In the AC mode all of the air should come out of the air conditioning vents. If you select blend, then you’ll get air coming out of all of the positions.
How do you reset a blower motor on a GM Truck?
However, you can reset the system by pulling the yellow 60 AMP VSES/ECAS fuse located in the under hood convenience center. After you remove the fuse you then start the truck and let it run for two minutes. Next shut it off and replace the fuse.
In many cases it’s a problem with the GM blower motor module. The most common complaint when this part fails is the motor will not turn on at all. However, it’s also possible for the blower motor to have speed control issues or continue running at all times even with the ignition off.
However, you can reset the system by pulling the yellow 60 AMP VSES/ECAS fuse located in the under hood convenience center. After you remove the fuse you then start the truck and let it run for two minutes. Next shut it off and replace the fuse.
Why does the blower motor relay not work?
This suggests that the relay may be supplying power to the blower motor regardless of turning the switch off. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all.
What should I do if my blower wont shut off?
If the blower stops with either of these steps, the problem is in the HVAC control module. However, if the blower continues to run at high speed with either of those tests, replace the blower motor control processor. Just as an FYI, the retail price of the blower motor control processor is $280.34.
Why does my GM front blower not shut off?
GM has issued a technical service bulletin (TSB) #06-01-39-002B to address problems with the front blower motor. In some cases in cold weather the blower motor may not run, or if it does, it may not shut off when you turn off the vehicle. The TSB applies to the following vehicles with automatic temperature control:
Is the blower motor on a Chevy Silverado working?
Blower Motor does not work on 1 and 2 speed chevy silverado – YouTube I had a Bad Relay. I got one here https://amzn.to/2PSr6fQ It seems the 88-94Trucks have a different system to control the speeds than the 96-00 OBS style Ch…
If the blower stops with either of these steps, the problem is in the HVAC control module. However, if the blower continues to run at high speed with either of those tests, replace the blower motor control processor. Just as an FYI, the retail price of the blower motor control processor is $280.34.
When to replace the blower motor control module?
The TSB applies to the following vehicles with automatic temperature control: GM has identified the blower motor control module as the cause for the failure. The problem only happens when the outdoor temperature is -10°F or below. To fix the problem, replace the blower motor control module.
What to do if your Chevy blower motor relay blows out?
The blower motor relay on your Chevy vehicle is essential for the operation of the blower. If the relay is blown out, you will need to install a new one is soon as you can. Thankfully, it is fairly simple to tell if the relay is malfunctioning and to install a replacement.
What causes a fuse to blow on a blower motor?
If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.
What causes a blower motor resistor to fail?
The most likely reasons for blower motor resistor failure can include: 1 Corrosion from long exposure to air and moisture. 2 Overheating—if a motor finds it harder to move because of jamming or worn bearings, it can raise the resistor’s temperatures to dangerous levels. 3 Normal wear due to time and use.
When did the Chevy Impala get a blower motor?
If you have a Buick Rainier, Chevrolet Impala, GMC or Chevrolet Silverado pickup that falls between model years of 2002 through 2008 it probably has the same set up. Oh and don’t forget the Envoy and Trailblazer.
Where does the power go in a blower motor?
For each higher speed, power flows through one less resistor. Some car makers run blower motor power through the fan speed switch first, then through the blower motor resistor and then to the blower motor and ground. Other car makers reverse that and run power to the blower motor first and terminate ground at the blower fan speed switch.
If you have a Buick Rainier, Chevrolet Impala, GMC or Chevrolet Silverado pickup that falls between model years of 2002 through 2008 it probably has the same set up. Oh and don’t forget the Envoy and Trailblazer.