so looking at a diagram this morning, the headlamp switch on the dash gives power to the two headlamp relays and the main beam stalk, possibly brown/black wire. the yellow from each of the relays is power to the lights.
the high beam stalk feeds power out brown yelow? to the two high beam relays. they in turn give power out the white wire for main beam.
so your circuit should have four relays, light switch and stalk switch.