Thanks big_kev, that's given me something to work on - here are my observations.... Changing the cruise controls certainly alters the readouts, and depressing the brake also changes the readouts along the lines above. I get the 1.0 readout for whether cruise is on. The interesting observation is that the clutch pedal is showing as depressed all the time, when it clearly was not. By pushing the pedal up towards me taking into account the free play in the mechanism, I got it to show it was not depressed. Could this be the cause of my problem? Presumably there's a switch or sensor getting wrong readings, so I'll do another forum search and see what other folk have said. Cheers Dave