I just bought a 1995 88 Oldsmobile Royale, i love it, and of course i have to put my system in it. I have everything i need, but i dont have the head unit installed. Is there anyway i could hook up my head unit without having a diagram that tells me which wire is which. If this is possible please let me know. I have done alot of car audio work but i usually have a wiring diagram. Please let me know if there is something i can do. The problem is that i dont know which wire is which so i can connect the car wires to my head unit. Please help, how can i tell them apart. Thanks.