well, the only orange wire coming out of my headunit is orange and white... the illum wire as you know... the only dimmer wire coming through my factory wiring is solid orange... pin #3 on the pinout... i hooked it directly to that wire, thinking the harness may just have had a bad connection, and it still flickered, its almost like that wire has an inconsistant voltage coming through it, maybe the factory headunit only needs a slight amt of voltage?? but like i stated earlier... when i connect the illum wire to a constant 12+, the lights on the HU come and and stay on, no flicker, so i decided to run a wire from the illum on the HU to the headlight fuse, so when i turn the headlights on, the illum feature comes on, works fine even like that. i think my experience is something based in my vehicles wiring, but i got it to work now, even if it is "rigged" a bit. but all in all, the problem with mine i think is the vehicles wiring, MIGHT be the headunit, but at this point, i think i have personally ruled that out in my case.