fuse box relays

Hi guys having a few issues with my 1986 csw 90 headlights,side lights and full beam work fine,the issue is with main beam when turned on the fuse on passenger side only blows.so today looked behind the fuse box and found a flasher unit and two 5 pin relays anyone know what these 5 pin relays are for?
Thanks jon

It's most likely a short in the headlamp or the cable going to it.Unplug the lamp and if the fuse still goes it's the cable.

Cheers for that will give that a try