PeterP (A fellow 101 owner who lives not to far away, thanks for the help) came over today to help sort out the wiring, there is some confusing stuff happening in this truck, so we sorted what was what and it seems the Black Out switch has issues:( which hopefully will be fixed shortly.
We rewired the 12volt system from the inverter so when it goes to the Gas place on Monday he has everything there to bring it back to petrol as well as gas, gas only ATM.
Will take some pics when the newly manufactured petrol tank;) goes back in:)
Mrs hh:angel:

