How do I debug my cruise control problem? Chassis was built Jan 1988.

Kindly resize your images before sending - and if you upload pix more than just occasionally, ask for instructions about the Barth Photobucket. Thanks! Rusty

I suggest calling Jim at Complete Truck Repair in Jackson. He is very reasonable and helped me a lot with my Barth (and my current Class B). Tell him Mark sent you. He is very nice and is honest. only 1 1/4hr drive for you.
Otherwise...
https://www.barthmobile.com/eve...203943677#7203943677
Scroll down to the trouble shooting page link provided by RainCatcher

Had to look twice, looks like our Beaver almost!
What is your cruise control doing or not doing?
Gillig is still in business and if you have the VIN # you can call their CA office and get parts etc even for older coaches.

Thank you for your direction. I did call Gillig and they have already emailed me service data manual.

Next dose your unit have a Energenius inverter in it and if so how to hex does it work?