Hi. My S2 has developed a problem with the lights, dip beam both sides work (1st click). Main beam both sides (2nd click), dont work and the dip beams go out

. High beam works. Swapped the 2 little brown relays round and still the same. Also I swapped the light stalk over, changed the bulbs for known working ones. Still the same.
Any help will be much appreciated thanks.