Did you check fuse 12 on the left side of the dash? In addition to checking the fuse, make sure there is power to and from them.
Here is a link you may find helpful:
If you look below, I attached the wiring schematic for the AC system, which includes the fan speed control. There is a yellow wire with a green tracer that powers the control panel. Check that wire for power. Also, confirm the ground I highlighted on the last pic.
I highlighted the wire throughout the schematics so you can follow them. Also, I had to cut the pics in half to make them readable, but I did overlap them so you can follow from one to the next.
Here is a link you may find helpful when checking the wiring:
Let me know what you find or if you have other questions. Also, the last two pics are to help you locate the fuse.
See pics below.
Images (Click to enlarge)
Thursday, June 24th, 2021 AT 9:14 PM