yes. the Pabst fan by the drive boxes cycles when the machine boots up, along with the fan under the seat. I will go back through the error log to see what has been stored. every once in a while we get the E106 error on boot-up (steering encoder, if I recall. We have to fully spin the wheel both directions then the machine is happy)
I will poke at the various connections with a meter later this evening. I will share my findings.

Your help has been invaluable today - thank you!