Headlights not working on my Caldina, help pls!

[JudgeM]

Hi all.

I bought a 1993 Toyota Caldina 2.0 (4wd petrol) a couple of months ago as a kind of a project car to learn some automotive repair/maintenance on. She's a really tired car now and has few small issues here and there

So far the biggest issue is the headlamps have decided to stop working.
Both low and high beam do not work. I think it is intermittent, because once while driving they decided to turn on for a short moment.

I have checked and tested the relay that's under the bonnet labelled 'head' and it is fine.

What should I check next ? parking lights are fine btw.