Hi thereMotor 7
I installed the rostra cruise control in my Wee3 (2018) and using open circuit control switch. The 12 programming switch were configured to 1-off, 2-off, 3-off 4-on, 5-off, 6-on, 7-on, 8-on, 9-off, 10-on, 11-off, 12-off. I did the self diagnostic testing and all procedure were ok according TROBLESHOOTING manual of Rostra. I took a ride to test the cruise and ON light of switch was ok, engaged light turned ON when pressed set/cost, when press the bake the engaged light cames OFF, press again set/cost engage light comes ON. So, there are no problems with lights of control switch or diagnostic light (it worked as expected in the self diagnostic). But, the rostra did not worked as expected. When I release the accelerator the speed does not hold. The cable throttle of rosta in the body throttle on Wee it is strained.
In attach it is the wiring diagram that I used to installation follow your previous drawing.
If you have some advise I will be very grateful.