How can you find which wires do what when putting a new CD player in a 1992 Oldsmobile Cutlass Ciera?

Any car stereo shop, or other place that sells car stereo, for that matter will be able to provide you with a wiring harness adapter that will plug right into your factory wiring, and color-code to your new CD player for around $12.To save yourself the $.....Yellow is 12v ConstantRed is 12v switchedbrown/gray is left front spkr + and -green/gray is right front + and -Dark blue/light blue is Right rear + and -Brown/yellow is Left rear + and -