I added a 4channel amp to my factory head unit. When I turn the key 1 click it has no feedback and sounds good. When I turn it to ACC or ignition on it has a whine. It's not alternator, but a constant whine. It does it when I turn off the head unit but it will stop if I unplug both sets of RCA cables from the amp. The amp is under the passenger seat with the power wire running under the drivers seat and under the console. The RCA cables and speaker wires are run down the passenger side. I did put in a line out converter. Any help from the bank of knowledge? Thanks
Ok, I isolated where the noise is coming from. The line out converter is causing the noise but only when it is against the wiring harness running behind the head unit. When I take out the HU and lay the converter in top of it while its out it doesn't whine. I tried separating the converter from the harness with aluminum foil with no luck. Where do I go from here?