Radio Wiring Adapter
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 power/speaker harness — see this combined 10- & 6-pin forward/reverse harness. You do not need the combined harness when switching to an aftermarket HU.
Features on this 10- & 6-pin harness:
Notes About Power Antenna Lead
All Subaru models which use this harness include a lead to supply +12V power to the car's AM/FM antenna booster amplifier.
The standard version of this harness has the power antenna lead at pin #8 on the 10-pin harness, where it is needed for all Subaru models with Fujitsu Ten navigation.
Legacy and Outback models with non-navigation Panasonic display HUs (with 4.3" screen) require this lead at pin #4 on the 6-pin harness:
HU models include PE669U1, PE658U1, PE627U1, PE438L1, and PE427L1. If you have one of these (or similar with 4.3" screen), be sure to tell me your factory HU model number when you order.
Most recent Toyota and Scion models do not have the power antenna lead on this harness. Instead, it is a separate lead on the AM/FM antenna harness. For those cars, you can extract the wire from the 10-pin harness to reduce the number of extra wires behind the HU. You will need an antenna adapter that includes the power antenna lead.
Version With Speaker RCA Plugs
If your car has the OEM harman/kardon amplifier and speaker system, see this post.
I'm now recommending that people with the h/k amp use their aftermarket HU's line-level outputs. You'll want the version of this harness with male RCA plugs instead of plain wires for the 4 speaker signals.
See my Subaru/Toyota 10- & 6-pin pin-out table for more information about the factory wires.
OEM Amp Remote Trigger Lead
In these models, the factory 10-pin harness includes a pin for +12V amplifier remote turn-on:
The factory wire is at pin #9 on the 10-pin harness. The above models will require a harness that includes a corresponding lead:
Add this lead (BLUE/WHITE) to the harness for an additional $2.
For custom lighting projects (e.g., footwell lights, customized gauge illumination, etc.), ask me about adding the Illumination(–) lead for an additional $1.
Note: aftermarket HUs do NOT need (and cannot use) this. Connect an aftermarket HU's "dimmer" wire to the "Illumination (+)" wire that I include standard!
Some Toyota models do not have this
signal. Check your car's harness or wiring diagrams before