Radio Wiring Adapter
WRX, STi, Forester, Legacy, and Outback models with OEM harman/kardon speaker & amplifier system ask me about this version that connects to your new HU's line-level main speaker output RCA jacks:
(like Metra 70-7553 and Scosche NN05B, except includes 3 SWC wires)
Note: If you want to keep your factory head unit and add a subwoofer, speaker amplifier, Line Output Converter (LOC), audio processor, gauges, phone car kit — any application where you need to tap off or connect between wires on the radio harness — see this combined 20-pin forward/reverse harness. You do not need the combined harness when switching to an aftermarket HU.
For older model years and 2008–up Imprezas and Foresters with OEM Kenwood or TomTom navigation, please see this 14-pin wiring adapter. Ask me about my 24-pin secondary harness to retain your SWCs, aux, etc.
None of the other after-market harness manufacturers include the wires for the Audio Steering Wheel Controls (SWCs). Some have even omitted the ground, power antenna, and illumination wires. My harness avoids needing to tap into factory wires (the reason you use this kind of harness in the first place).
Features on my 20-pin harness:
Ask me about adding these additional wires (for special cases):
See my Subaru 20-pin pin-out table for more information about the factory wires.
Also available: Axxess ASWC steering wheel