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Having looked at a BRZ workshop manual it is Toyota based rather than Subaru's familiar layout.
Attached is the Audio wiring from a 2014 US model if it helps although I think the BRZ is GT86 based apart from the engine.
Looking at a Toyota ISO adaptor the sockets for the loom plugs (on the left) look similar to two of the sockets you show on the radio
which appear to be for one pair of speakers. The rest are supplied from a linked separate amplifier
Last edited by Don Clark; 31 March 2021 at 09:57 AM.
31 March 2021, 09:42 AM
