I have an 04 3 HB and I was wondering, is there any way to wire the halo's so that you can run them with the parkers AND have them flash when using the turn signal? I would assume not since you would need to have 2 CCFL's in each halo, basicly like the filaments in the turn signals. Thanks everyone.

 

I'm thinking YES! But I don't think it'll have the outcome that you want. The CCFL's are fluorescent a take a while to warm up. Plus theyare poweredthrough a ballast. They are not liable to like being turn signals. It is also likely that it will be illegal if you drive on the street.
To answer your question: I wonder if you could use a 5-4 wire tail light trailer converter, but in reverse to accomplish what you want?