I am new here my friend has a 1999 mk4 astra 1.6 16valve and he is having problems with his dail lights normally when you switch your headlights on they should come on so you can see what your dials say but his does nothing some fair we have done.
Changed all of the fuses in the fusebox inside
Changed the dials
Changed the bulbs (all have been metered)
Changed the dimmer switch
Cleaned the contact on the plugs
It is all now pointing to wiring does anyone has a wire diagarm for the plug on the rear of the dials or any advice on something else i could check or do to resolve this issue