Just wired up my rally lights on my 99 GV. One of the wires is WHITE, the other is red with a white stripe. Unfortunately I don't remember which is which as I type this. The wiring diagram is at work.
I think that white is positive power to the headlamp bulb all the time, and the red/white wire is the negative for the high beams (as long as the high beam switch is on). I'm fairly certain but again I don't have the diagrams in front of me even though I just finished my lights 2 nights ago. (Aimed them last night, love them!)
James