On my 16 and 19 TGs the two running lights would go out when I turned on the high beam. I know some states have restrictions on how many lights you can have on at a time in the front of a vehicle, but my high beam only certainly decreased the lighting off to the shoulder area.
Had a front tire installed last week and when I read the paperwork there was a note from the tech indicating the fact that my running lights went out with high beams on. When I asked about this they told me it could be changed if the customer requested it.
Needless to say I had them run it back inside and hook it up to the computer and make this change. I'm probably the last Harley owner to learn of this but I thought I would post it anyway just in case.