Motorhome came back today. The renter, his son, and 2 boys took it to Bristol to watch the races.
Said that they had a great time. Thanked me and the wifey for letting them rent the motorhome. We haven't had any bad reviews on it yet.
Well....I washed the motorhome. The front was covered in some big bugs. The last thing they saw was their head going through their azzes.
Was going to work on finding the issue with my SpeedHut gauges and diff pump and fan. Jumped in the Z, started the engine and everything worked ok.
Think I might have a loose connection for power somewhere. I'll see if it happens again.