I have a 2002 Autotrail Starspirit fitted with a Scheiper Sonde 4 Point (five wire) fresh water level sensor. Having successfully replaced the original PMS power management unit with a CBE PC210 setup I now wish to replace the water sensor with CBE's three wire version. But…the only wire on the original sensor that I can identify is the -ve (earth). None of the other four wires appear to be traceable to where the PMS was installed, where there are two wires that - according to the Autocruise wiring diagram - should have been connected to the original sensor. Any advice please?!
