Toyota Corolla Wiring Harness Set with OEM Microphone, Steering Wheel Control, and OBD II Socket. Premium Wiring Harness Set for Toyota Corolla 2014-17. OEM Microphone, Steering Control, and OBD II Socket. A, B: Power, Speaker, & Steering Wheel Control C: Backup Camera Video Input (Required for Backup Camera) D: Communication (Enables Vehicle & Oil Consumption Information) E: Steering Wheel Control F: OBD II G: Bluetooth Microphone (Toyota OEM) H: Aux I: AV Input J: Reverse Detection K: Earth L: USB M: Radio Antenna Socket. Connecting the wiring harness set to Corolla CD Player.Connecting a backup camera to Corolla CD Player. A backup camera from the market usually includes three parts: camera body with lead cable, power cable, and data extension cable. Please refer to the following listing if your vehicle has no steering wheel control. If you need steering wheel control and more features, please refer to the following listings. Check out my other items. The item "Premium Wiring Harness Toyota Corolla CD USB AUX AV Bluetooth OBD Wheel Control" is in sale since Saturday, February 16, 2019. This item is in the category "eBay Motors\Parts & Accessories\In-Car Technology, GPS & Security\Terminals & Wiring\Wiring & Wiring Harnesses". The seller is "fingerprint617" and is located in Shanghai, Shanghai. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.