Scooter doesn’t make a muck no light

Hello, I have a China scooter (Flex Tech Fun 50). The following problem occurred at once. The scooter didn’t start, did nothing. Starter relay didn’t turn. Starter relay didn’t paint. Light and horn still went. Later on, no light and horn went on. Battery is as good as new and charged. Starter relay gets power, but doesn’t switch. Have this bridged and then the starter turns. Other starter does the same. Ignition lock replaced, even without success. Switch on Side stand is fine. Cable visual inspection apparently all ok. But I will look even more closely. Do you have tips for my further procedure? Will there be only a little something to find. I’m surprised that no light/hupe is possible. There must be something about a cable that might be defective?! Which would be suspicious? Thank you Chris