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yea, i called up metra and they inculde in there instructions how to use the factory amp so i asked them if i should wire up rca's or just wire it normal and just run a wire to the blue wire to turn on the amp and they said its better just to run it normal and just tap the wire. I also talked to my dad who used to be a nuclear engineer for the navy and he said just to do it normal as well. I fix electrical systems on helicopters for the coast guard and it sounds like the rca are causing problem with this being the most of the are shielded pairs. but my question is to you tap the blue wire with the amp turn on wire or the acc red wire. cause if you tapped it with the red wire cause that could be the problem. if you tapped it with the red wire either use the amp/power antenna wire or go to the cig lighter and use the positive wire off that.
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