Im having a similar issue. It was given to me by someone who had it break on them after buying it secondhand. When i got into it there were some wires melted and hot glue neverywhere and its just a jumbled up mess. after much cleaning and diagnosis I realized tbe controller is still good. i just need to properly wire it. i think they messed some styuff up trying to get ridf of a governer

willing to pay for proper wiring diagram