I have a 1995 Alfa Romeo 146 2.0. Last week when I started the car the headlights didn't work. Sidelights, full beam and other lights were all normal. After failing to solve the problem I started driving and after about 30 minutes the lights suddenly came on and stayed on for the rest of the journey (about 90 more minutes), after which they would turn on and off as normal.
The next two times I have used the car the same thing has happened; the first time the lights took over an hour to come on and the second about 15 minutes. On no occasion has there been any 'intermittency'. I tried swapping the fuses with no effect, the bulbs are all fine and the battery is fairly new.
I have no idea what might be causing this. Does anyone have any ideas?
Many thanks in advance,