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  • 2003 Saab with Alpine head power... no sound?

    2003 9-3 saab convertible with alpine head and speaker amps (polk). I bought this car with this aftermarket gear in it. Just trying to get sound out of the head unit. I bought th metra 70-1784 harness and hooked it up properly. Head has power but no sound. I now found speaker amps under the front seat. Would like to get this unit as close to factory with aftermarket apline head. Should i disconnect the aftermarket amps? WHat to do with "blue wires on alpine head?

    1 AnswerCar Audio10 years ago