A/C blower not working

Hi,

So my issue began when I could not set my A/C to high. It would only work in low-medium. Then in the winter, when I would turn on the heat, there was a loud screeching sound. Then the blower stopped working all together. The A/C and heat still work, I can feel cold air coming from the vents. I have replaced the blower motor relay and the blower motor. I am not sure what else to try.

The blower stopped working a few months ago, but a couple days ago the radio stopped working also. Not sure if they are related. There is still power to the radio, and I can change the station but no sound is coming out.

Any help would be appreciated! I can try out suggestions as they come or give any more information as needed. Thanks!