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Does anyone have or know where I could obtain a wiring diagram? Have a number of questions. Are the wires from the radio high level? In other words could I attach a 5 channel
Amp
With high level inputs and run them direct to new speakers omitting the Bose amp
And speakers? Thus I am thinking 4 mid
Treble and sub woofer off from new amp. Any advice would be appreciated.

You need a line output converter to connect a different amp to the stock HU, and then run wires to the respective speakers you plan on amping. There isn't really a diagram to go with this process, you just need to tap into the speaker wires themselves. The 6X9s out back are a good starting point.

Thanks