ok.. this is info on how the headlight sense circuit works, for a 92 conti.. maybe different, but some of the basics may apply.
there is a very low resistance in the power feed from the headlight switch/autodim/ect. it is only 0.074 ohms.. nearly a wire, but not quite! the lamp out module senses the voltage drop ACROSS this resistor. If its out of expected range, it triggers the warning. Note: there is only 1 resistor in this system for headlights, and it monitors BOTH lights. Since most HID installs probably draw considerably less power from the headlight circuit (switch/autodim/ect) in the car than the halogens do, the lamp monitor sees a lower than expected voltage drop, and triggers the warning. The proper voltage (for a 92 conti with halogens) across this resistor is approx 0.47 volts with low beams on.
if your conti is like the 92.. its gonna be an issue to disable the warning. not impossible, but not simple
