Dimmer switch

The person that fixed this last time retired, no idea where they went. Said some contacts were worn or needed bending back in switch.

Relay ok, bulbs fine - only flasher high beam works and side lights, read about similar problems on land cruiser prados same switch mechanism. thx

That green - get rid of that, make sure all the contacts are nice and clean (careful with sandpaper - use very fine emery if needed - to prevent losing too much contact material.

Then put a dab of grease - ideally silicone plumbers grease - with a small screwdriver as it's difficult to wash off fingers.. on each contact.

The grease will stop any sparking and so make the contacts work properly for longer