[MrBasse]

Are you using Victors or Jaguars? We had the same problem this year prepping for an off season event. Our Victors had been unplugged and cleaned up and we found out that if you plug the PWM cable back in it doesn't always connect. Not sure if that happens on a jag or not, we had a tally on our jaguar stickers very much like the red baron and after the sixth on started on fire we ditched them and haven't looked back.

But check and double check the connection between the PWM cable from the sidecar and the speed controller. Once we had that in everything came back to life and all was good.