Scirocco Register

hey up peeps not been on for a while still broswe and still having happy motoring in my scirocco ,just one thing my clocks have started to mess about , when i put my full beam on my dash light flash and my rev counter goes back to 0 but i i dont flash my high beam everythings ok ,so i had a spare set what i new worked ,so i took the old set ato put in to the good set ,all put back together starts the car up all ok ,puts lights on there working , puts full beam on bang rev counter back to 0
anyone know whats wrong with it
cheers lee

Check the earthing cable between the bulkhead and rocker cover. I think you get exactly this problem if that isn't properly earthed.

Cheers mate will do

Right I checked the earth between the bulk and rocker cover ,all good new cable all tight but its still doing it anyone eles know what it could be .

linked to your broken wire under the bonnet?