Benton

Thank you so much, Nealh, for pointing out the broken Black earth wire. I hope lo mend that in the weekend. Thanks also to saneagle for explaining the purpose of the buttons on the display panel.

I am a retired power generation engineer, who still occasionally finds himself doing STEM (science tech engg maths) business, albeit on a voluntary, informal or part-time basis. My research background often takes me back to fundamental principles in most things I do, while most other people would probably not bother with such an approach! I came across Pedelecs purely by accident while surfing. I have been using electric bikes since 2008. My main interest in joining is to keep my existing URBANMOVER UM55 Cruiser on the road electrically, rather than using it as a pedal bicycle, which is what I have been doing for the last few weeks. I may become a customer of another e-Bike in the future. My dream e-bike is a Full Throttle, step-over or folding and rear motor one. However, I would only buy it, if the battery could be renewed, or replaced, at a reasonable cost. Further, detailed information including circuit diagrams of any pcd's and control units must be available, and all essential spares that are prone to wear off in a few years must still be available for at least ten years after purchase.

I have used two URBANMOVER ebikes since 2008. They are the folding UM24 and the UM55 Cruiser. The UM24 was stolen in 2016; so I bought a virtually new UM55 in the same year with the insurance payout, which has a thumb throttle. They have changed my life in the last 16 years! Praises for both models can be given in a future posting, if anyone is interested. When the battery is switched on the lights on the Throttle will come on, but the lights on the very simple Display Unit that came with the UM55 (Photo 1) will only light up after the Power button on the Display Unit is pressed. Now none of the lights on the Display comes on when the Power button on it is pressed. Photos 2 and 3 show both sides of the Printed Circuit Board inside the Display Unit. A volt meter shows that the voltage between the Red & blue, Red & Green and Red & Yellow is all 24V. Oh, the brushless motor is no longer turning. I was told that a resister or capacitor on the Display pcb might have been blown, or become disconnected due to any poor original soldering. If you could help me find that culprit, I should be ever so grateful. By the way, I have checked that all the connections in the Control Unit are in perfect order. The Control Unit is not to blame either, since replacing it with a new Control Unit made no difference.