You're right Gary, although I tried this and number 5 from memory without success. Maybe I was doing it wrong, but I think my brakelights should have flicked or something, but maybe not if it toggles a horn signal. I notice on the controller board there is nothing connected to horn. It does have a caption stating MP wheels beeps are replaced by flashes of light.
6. Anti-theft alarm setting:
Cut off power supply to motor (called soft-switch, but controller is still powered
on) and take out the battery key, within 10 seconds press and hold the cruise
control button until you hear a beep sound, then release the cruise control button.
The vehicle is now protected from theft and the motor is electronically locked.
Any movement or vibration of vehicle will trigger the siren for 30 seconds, and
the motorized wheel will resist any pedaling movement.
I have no clue how the controller does this without power connected to it lol. My thoughts were it was for a controller with key switch operation, and the above process - enables the alarm function, not the motor power itself.
http://goldenmotor.com/SMF/index.php?topic=1569.0 << Manual