I was wondering if someone could help me out. I have a 1992 Nissan 240SX. I have a head unit that I'm going to install, and like all the other head units I've installed its been very simple, I just buy an adapter for the stock harness and twist them together matching all the colours. My problem is that I have purchased two seprate harness adapters and neither works properly yet they both fit the stock harness, so I have moved on to try to get my hands on a wiring diagram. So my question is does anyone know where I can get one either from a website, or a store?