Okay, so the first stumbling block on my replacement head project arrived in the form of the Metra wiring guide (Metra 70-1857 Bose Integration Tuner Bypass) . First off, instructions are non existent with this product, which isn’t very comforting for a novice (like me!). There’s some general information and a wiring guide on the back of the pack and a tiny note inside the bag telling you where your amp’s located (which I knew).
To make things worse the bag the harness came in had been torn and taped back together, right through the wiring guide! I went to the Metra site expecting to find further help and at least wiring information (it says on the bag “for further information…”). I’m always too optimistic it seems and not only was there no further information online – there was NO information at all! With patience and help from my wife in translating the Spanish, I managed to decipher it. Just in case anyone else has a similar problem, I’ve reproduced the chart below: Continue reading