There's a fix for this. I've been working on HID headlights and people use a capacitor/diode solution to "smooth out" the headlight signal. There's a good thread on another forum about it though I don't know the rules about linking it here. I'd say if you search for JK headlight harness how-to, you'll probably find some good advice. Funny thing, I rigged a relay up for the HIDs using the stock headlight circuit as a trigger and had no chatter. I wonder why some have it and some don't..