The problem you're experiencing is the same problem I had. I bought mine with the instrument cluster with exact same symptoms as you're having. I took mine out and took it apart and did all the troubleshooting. Ended up replacing with a new one. This was about a year and a half ago. You will need to find one somewhere. I'm thinking that the previous owner before me probably tried to jump start the scooter while reversing the cables. Just speculating. The part number you will need is 37200-LFH1-E00, (pic attached) They're hard to find now, but keep searching, you'll find one. Good luck with it.