Hi Zeccato and
to the forum.
On the later controllers, the Pedelec is activated automatically and no longer requires the two presses on the cruise control button to select it.
The only way GM allow for reducing the speed to 50% is by programming the controller with the USB interface lead, and this would mean that the speed would then be reduced all the time.
An alternative method is to modify your throttle as shown here:
If you use another trim pot in place of the 5K potentiometer, it can simply be adjusted by trial and error to provide 50% motor power
(or ~50% speed) at full throttle.
It might be possible to solder the two pins on the trim pot directly to the switch contact pins for an easy installation.
The switch simply bypasses the resistance of the potentiometer or trim pot
(variable resistors) to enable unrestricted power and speed.
Regarding the throttle operation, it should be possible to control the throttle by using a pedelec device to activate it, but I have not yet come across an easy way of doing it.
If anyone else has already managed this, or come across some information showing a simple way of achieving it, could they please post the relevant details
(or a link).
I once saw a home made device, which was basically an idler sprocket mounted on spring loaded arm incorporating a micro-switch, that ran along the top section of the chain, so that the switch would only operate when the chain was pulled up under tension
(i.e. pedalling), but this idea would not be easy to implement if you are using a double or triple chainwheel.
Alan
