HID kit side-effect??

[ozmdd]

I just installed a plug-n-play H4 HID kit with Halogen hi-beams, and everything seems to be correct about it...BUT...I now have an odd problem with my dealer-installed cruise control. The cruise control shuts-off after only a few minutes, and does so at a variety of speeds. It has always held its speed indefinitely.
Since I've made no other mods in the engine bay or relating to wiring/stereo, etc., and the problem developed immediately after the install, I'm figuring they are related, but want to get some input as to the reason before I ditch the HID.

I mounted the ballasts using the brackets in the kit, and located them on the inboard side of the strut towers, as there is an unused threaded bolt hole at that location on both towers. I know that many others mount the ballast on top of the fuse box on the drivers side, but mine is about 3 inches behind that. The passenger side ballast is located just-above the wiring bundle that runs from the ECU to the front of the vehicle along the strut tower. There is at least 8 inches between the ECU and the ballast.

I did not have to cut/splice ANY wiring, and everything plugged together easily using water-tight connectors.

Is this related to the ballasts, a freak coincidence, or did I damage/loosen some other connection while I was fiddling around under the hood?

Has anyone else experience a similar problem with/without the HID's?