Bonzo's progress

[Bonzo]

A very valid point indeed Mr H

The " Will the ECU be looking for a signal ? " has crossed my mind & as such, I need to keep an open mind on this particular subject.
Yes, I will make sure that I do as much research as possible

Rob

A fixed value resistor has also crossed my mind .... I guess the trick there is finding the value the ECU is looking for.
Again, plenty of reading to do as yet

To be honest chaps, I am only going this route for the challenge & in the hope that I manage to learn something in the process .... Hopefully i'll learn more than just " should have left the wiring alone "