This could be due to a disconnected brake cable or a seized brake.
Frist inspect the brake cable. Make sure that it is connected securely and does not have a broken or damaged component.
If the cables checks out then the issue is likely within the brake.
I have attached the diagrams for the brake system from the pedal to the equalizer.
Please let me know what you find.
Images (Click to enlarge)
Sunday, October 3rd, 2021 AT 1:43 PM