2002 Toyota Corolla Car Radio Stereo Audio Wiring Diagram Whether your an expert Toyota electronics installer or a novice Toyota enthusiast with a 2002 Toyota Corolla, a car stereo wiring diagram can save yourself a lot of time. One of the most time consuming tasks with installing an after market car stereo, car radio, car speakers, car amplifier, car navigation or any car electronics is identifying the correct color wires for a 2002 Toyota Corolla. 2002 Toyota Corolla OE Wiring Harnesses & Stereo Adapters Toyota Corolla 2002, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler.