Thanks so much for your quick response.  I will try to disconnect the cable, clean them up and reconnect.  Will try to purchase a new battery as well to se if it works.

I have a 2020 UForce 500.  I just recently have experienced the EFI dash light and when trying to start the machine it just clicks when turning it over.  I thought maybe it was the battery but it has a full charge.  Any ideas?  How do I go about fixing?  Any help is much appreciated.