1985 88 stereo wiring

anyone have a diagram? i am planning on adding a pioneer but i don't know what wires are what. in my 1984 gp my factory stereo had a diagram on to it. does my 88 have it to? help

No, there isn't a diagram... Off the top of my head (and this is how an 86-90 is wired), there should be 3 bundles that attach to the back of the radio. One bundle, the black connector, is your power. black is ground, yellow and orange are power...I don't think the others are used, at least not on my rockford fosgate. The other bundles (white and blue connectors, I think) lead to your front and rear speakers.

Not much help here, but I might be able to take apart my dash and look at how my 89 lesabre (same coloring) is wired and give you a better color-coding if you still need it.