Hi I have a golf mac 4 150 bhp when I turn headlights on most of the time the interior lights don't cum on or dash board lights and when they do the dimmer doesn't work I checked the fuses and changed

It is most likely a bad light switch its very comman with golfs and jetta to have it go bad after a few years. Replaceing the switch should fix the issue. you can get a new one online or at the dealer. its not to relativly expensive if i remember correctly.

Hi I tried the switch but it still does the same thing that's the headlight switch am on about where u turn the headlights on from..

did you try moving hte dim switch up ? there is anouther roller switch that will unaluminate the interior lights ussaly located jsut below it. this could be the issue switch.