[Snitty]

there will be no problem runnin both relays off the same power... only one circuit will be closed at a time, except for the mere moment when the high/low switch is pulled back between low to high... I actually used 12g trailer wiring, which is already bound together, to run to the headlights, each light will need 3 wires to it... high 12v, low 12v, and a ground... i brought all grounds back to the relay station to run to a common ground... you don't have to do it that way, but i wanted all important connections in one local area for ease of troubleshooting in the future...

the scematic in that write-up seems to be pretty easy to follow, and looks as though it will function well...

If you get a relay (like I did) with dual 87 posts.. NOT 87 and 87a.... JUST two 87 posts... you can hook each side to its own 87 post instead of splitting off one

be prepared for some bright sunzbetches.... my high beams will now give the sun a run for the money.