I have a 2004 Mustang that I bought last year. After replacing a blown tail light bulb, I noticed that the factory wiring harness had been replaced with an aftermarket harness that still flashes the rear turn signals in sequence. Since they weren't "sequenced," I assumed they didn't have the required modified blinker. I ordered it from Revain and when I went to install it, a modified turn signal was already there. I decided it was buggy and installed Revain. Same result. If you squint, it looks