Originally Posted by Drifter420
Would it damage anything to have have a separate hot power goin to the lows when the hi'* are on? Would it not travel back up the stock hot lead for the lo'*??
Sure it would, but where would it go?
It doesn't matter which end of the wire the current goes in, whether it'* up at the switch or down behind the headlamp; it can only pass through the filaments to get to ground, since the switch up at the other end is currently off.
In fact this _is_ how you power the low beams when the high beams are on: you provide them with a separate power source, since (1) you can't tap into the high beam circuit to power both beams (you'll double the current load on that wiring), and (2) the normal low-beam power source is turned off when the high beams go on.
Ergo (hey, there'* an expensive word), you use a relay that'* triggered by the high-beam circuit, and have it turn on a separate power supply that you put in for the low beams.
You don't need a fancy relay; the usual black plastic 30-amp automotive relay from Radio Shack will do fine. Just be sure that you have a fuse in the new power supply to the low beams.