Thanks for the warning and I'll make sure to double-check the high side with my multimeter when I'm running the wiring for the extra features on the new headlights. But as my horn isn't working at the moment (haven't had time to take the E21 wheel she came with off and make the adjustments I've read about elsewhere in the forums) and I'm making very.... creative use of the high beam dipper switch on the left stalk to compensate (as best I can, at any rate), you could say I check that very regularly. Chicago drivers are rather awful. Also, my garage door is manual, so pull out, close, walk back while gazing at that pretty front end. No glow in the highs (and I tend to drive with my lights on out of habit), but again, I'll check it to make sure and report back.
The wiring makes the Italian part of my heritage shudder every time I look at how hacked up some of it is, so I'm not making assumptions in either direction without actually checking.