you are correct in the wireing. if you have a multimeter it is easy to find to "high" wire. all you have to do is tap into that wire, either by making a plug or connecting to the wire lead. the other two contacts do not need to be connected to anything . a ground wire is the same as the vehicles metal chassis. it is all connected. the relay should have four wires connected to it: (1) constant +12v, (2) constant ground, (3) load wire to lights, (4)switched +12v from high beam. off the top of my head i dont remember the placement of each: i.e. 85, 87, 30, etc. but its not hard to google. hope this helps.
Originally Posted by Dick Foster
Don't think too hard, just follow the damned instructions.