Disclaimer: The steering wheel controls that work with the aftermarket radio are volume up, volume down, next track, previous track and mode. Additional parts may be necessary to keep your factory steering wheel controls depending on the radio you are installing.
Notice: These DIY instructions are only meant for Honda Civics without navigation and with or without the premium sound system. To complete the installation you must color match all the wires to your aftermarket radio harness. The blue/white wire of your aftermarket radio must be connected to the blue/white wire on the 20 pin connector otherwise you will have no sound. If you are having trouble please call or text 877-542-2872.
Gray 17 Pin Connector A (Premium Sound)
| PIN | COLOR | FUNCTION |
| A2 | Black (RCA) | RL RCA – |
| A3 | Black (RCA) | FL RCA – |
| A7 | Black (RCA) | FR RCA – |
| A8 | Black (RCA) | RR RCA – |
| A9 | Black | Ground |
| A10 | Orange | Illumination 12V+ Output |
| A11 | Green (RCA) | RL RCA + |
| A12 | White (RCA) | FL RCA + |
| A14 | Red | Switched 12V+ Output |
| A15 | Gray (RCA) | FR RCA + |
| A16 | Purple | RR RCA + |
| A17 | Yellow | Constant 12V+ Output |
Gray 17 Pin Connector A (BASE)
| PIN | COLOR | FUNCTION |
| A2 | Green/Black | RL – |
| A3 | White/Black | FL – |
| A7 | Gray/Black | FR – |
| A8 | Purple/Black | RR- |
| A9 | Black | Ground |
| A10 | Orange | Illumination 12V+ Output |
| A11 | Green | RL + |
| A12 | White | FL+ |
| A14 | Red | Switched 12V+ Output |
| A15 | Gray | FR + |
| A16 | Purple | RR+ |
| A17 | Yellow | Constant 12V+ Output |
Dark Gray 20 PIN Connector B
| PIN | COLOR | FUNCTION |
| B5 | Blac (RCA) | AUX Input Ground |
| B6 | Gray/Black | Steering Wheel Control Ground |
| B7 | Gray | Steering Wheel Control Output |
| B13 | White (RCA) | AUX Input L |
| B14 | Red (RCA) | AUX Input R |
| B16 | Blue/White | Factory Amplifier Turn On 12V+ Input |
Gray 2 Pin Connector C
| Pin | Color | Function |
| D2 | Black | Antenna Signal AM/FM |
| D3 | Blue | Antenna Power Input 12V+ |
