A couple of suggestions for the cruise control:
- make sure the brake sense wire is connected to the load side of the brake switch. Otherwise the controller will receive 12volts continuously, signalling it that the brake pedal is depressed.

- some controllers need to sense a path to ground through the brake lamps when the pedal is released. If the brake lights are not connected, or are LED, there may not be a path to ground. Try connecting a standard globe temporarily in the bra circuit to give a ground connection through its to filament