Hi All, My Mk4 GTI has developed a problem where the water temp gauge is only working sometimes. I have wriggled all the electrical couling (I think). As there apears to be a couple of sensors could someone please head me in the right direction as to what to check or change.
Also have a problem with Drivers side door light isn't working, I have checked globe. Is the earth switch fitted in the door lock?

Regards
Woodgrub