I would go back to that ground screw and make sure it is making a good connection. Sounds like maybe it isn't getting a good ground so it has to back feed. But there are people way much smarter than I on this.
Thanks. Kinda was my thought too so an intermediate step I made was connecting the ground to the inner fender instead of the radiator support plate thinking getting it farther away from the headlight relay kit relay would help. No dice. Then went with the attempt of running the ground all the way back to the trunk terminal. Still no dice. I'm sure it will end up being something stupid, but argh!