Originally Posted by Däs Schmoo
If it is aftermarket it won't have harnesses that utilize the stock wiring. You will have to find the correct wire for each function and then splice the wire with what they give you.
I would start by looking for some sort of wiring diagram for that car so you know which wires are which.
isn't there a harness that can be bought to make the install plug and play, like for stereo's?