i have removed the panel checked all the connections on the pcb boards.
yes you are correct the readings are when the electric hook up is connected and with a seperate tester at the battery and in the van which give the same readings. Today i will try what you say and come back on here with the readings
I have been in touch with CBE and awaiting there comments and also requested a wiring diagram of the boards as i may be able to get it repaired. there appears to be no obvious damaged to the board.
i have also been speaking to travel world
its anoying because the van is unusable at the moment
thanks for all your help so far
I doubt CBE will be much help, I also doubt they will give away their circuit diagram.
You'd have more luck Googling the model number of the control panel, if it shows one.