I have an intermittent problem with the speedo on my 406 Exec. this is an intermitent fault, when I am driving along it sometimes just drops to 0 mph until I get to above 60mph when it works fine, other times it reads ok for weeks on end before it has issues again . This leads me to believe that it may have a faulty connection or a lose earth somewhere.... but that is just my (usually useless) guess work. Any help would be greatly appreciated Many thanks Nige