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I have tried a new S866 with no joy. I will check what you have said. Question - if the motor fails will the S866 not show anything?

Swapped the 'display' sorry!

Because the bike shows no sign of power, display lights, motor, etc. Multimeter on battery showing full voltage. Swapped controller for new one with no result. - only thing left!

I have an ebike but the controller has failed - the display is S886 - the controller has a model number on it JH34Z3205DZWBT but unable to find a similar controller online. Not with same connector setup anyway. Any help would be greatly appreciated. Peter COLORWAY 20'' Electric Bike, Folding...