My Guess on Wiring
I think there is a relay in the big black tube into which the large white, fused power wire and the large black ground wire go into. I'd use a 12 volt test light and clip the alligator clip to the spade connector and then use the probe to connect to the high beam circuit, after connecting the power and gnd. My guess is the Aux lights will not come on unless the high beam is on because only then will 12 v current go down the small wire into the big black tube. However, I think the headlights are also on a relay so the spade connector might go there. The bottom of the headlight relay might have 4 or so spade connections and you could use the test light to see whiich powers up the high beam circuit. I suppose if the PIAA lights work with only the pwr and gnd connected to the battery, my guess is not good. But, a small amount of 12 v current going into the relay will "connect" the power wire to the aux lights.
Last edited by Wildbill1945; 12-11-2012 at 11:05 PM.