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Ok... i've replaced the headunit with an alpine. I've got 8" component speakers in the door. I was going to go off of the speaker wires in the door that come from the head unit.
Which wires in the door are the positive and negative wires from my headunits wiring? Is it the same as the wires on the harness at the headunit end?
Or... do i really need to go directly to the headunit with speaker wire?