I need a wiring diagram for the factory stereo in my Ford telstar orion 1996. I've looked all over the internet but can't find anything that helps. If it is not possible for me to find it what wires are critical that i have? I've used my multimeter using continuity to find which wire goes to which speaker and which is the battery and ignition wire and ground etc. but there are still a few wires left over which im not sure what they do. cheers.