Got my kid to look at a mobility scooter that wouldn't take power,she found a cable going to the controller melted,replaced it,but dressed the leads wrong resulting in a short of the 36v battery becoming negative grounded.The old lady said her radio makes this buzzing sound,kid said,shouldn't matter,i said,Little girl,the kid who bragged how she did an IF alignment on a Russian Communications receiver,where,according to her,''all the knobs work the wrong way'',these things run an ungrounded supply,to prevent the controller,which chops the incoming DC into Square wave DC,from radiating harmonics at RF,no fix it please.:lol: