Have found it time consuming to obtain schematics most of the time and resort to this:
Identify Constant Hot, Ignition, Ground with Meter or test light.
For other wiring, none hot, and none with resistance to ground. These may be speakers.
If you have a little tone generator(Like phone and alarm guys use)when on right pair,
You will hear tone through speaker, write these 2 colors down, and left front or whever.
You could also take 1 1/2 volt battrey, and with 1 wire touching 1 end and move the wire
Across other terminal, should hear scratching sound. Don't leave connectecd(momentarily)
If you are able to get to speaker, When you momentarily connect battery, will either push out or pull in. If it pushes out, The Positive battery is touching Speaker +
Power antenna, and night illumination may have to be dealy with.
If there is a factory amp, that's another set of problems, If not used, will have to jump out.
May be in trunk?
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