Are you sure switch is working ?
Check again for open/closed circuit when you press it and check cables again.

iirc the correct voltage

yeah , tested it the other day, i had a voltage of 6v though.

I really don't know what else can it be. You have to connect at dashboards' ecu and read values/errors.

Ok Thanks a lot, will get the dealer to look at it when I take my car in for it's Cambelt.