When the controller clicks and the scooter does not move that is typically caused by an old or worn out battery pack.
The Voltage level of an old or worn out battery pack will significantly drop when the throttle is engaged which will give the controller enough power for its internal relay to click, but not enough power to operate the motor.
When a brake lever switch becomes defective it often locks into the on position which tells the controller to turn the motor off. Disconnecting the brake lever from the controller makes the controller think that the switch is in the off position.
Sorry to hijack this thread.. but I have something similar..
I'm trying to fix a razor scooter for a friend. I got a new controller thinking it was the issue. The new controller also doesn't work! I'm not sure where to go next.
I'm currently running off a adjustable bench supply instead of batteries. When I hit the throttle I hear a relay click but there is no voltage on the motor. I unplugged the brake control and still nothing. If I just put the power supply on the motor it spins just fine.
When I ohm out the throttle the orange wires short together and so do the brown ones when I engage the throttle.
What else could be wrong? Is there any reason why the motor controller wouldn't work with a bench supply?
Yeah my 9 yo daughter informed me that the scooter has to actually be moving for it to work!
D'oh! I was able to get it going spinning the wheel by hand!
The controller probably wasn't bad after all! oh well! now it has a new controller. Once I get the new batteries it should be fixed. Maybe I'll ebay the old controller...