I have attempted to explain. You go "eliminating all wires" and you will find there are other things "in there" the no longer work. Like, maybe, the alternator.
Let me put this another way........start "backwards" from the ECU connector (igntion box) Carefully untape as you go from the ignition box towards the ballast. Eliminate wiring hooked to the ECU. If you come across an in harness splice do NOT eliminate from there "forward." Then splice what's left all together at the ballast.