The Install Doctor - Radio Wire Harness and Colors - Toyota Free car stereo and car radio installation resource. Step by step installation instructions complete with photos, tool list, and wiring detail. Toyota Stereo Wiring Harness | eBay Wire Harness. Wiring Harness for Select 1987 & Up Toyota Vehicles without factory amplifiers or when bypassing factory amplifiers. Plugs into Car Harness at radio. This wire harness does not fit vehic..