I can get it for you later today (when I get home from work) - I tapped into the high beam indicator circuit to feed the relay coil (via the switch) - so just one wire through the firewall to the relay.
I do have a couple of engine manuals that came from somewhere on the internet - but I'm pretty certain that all the iO or Pinin specific documentation I have came from the resource section here.
PM me an email address and I'll send you the wiring supplements.
It's in the resource section ...
I can get it for you later today (when I get home from work) - I tapped into the high beam indicator circuit to feed the relay coil (via the switch) - so just one wire through the firewall to the relay.