Originally Posted by JohanW
I have the relay from technics harness very close to my rca-cables. Could the relay cause any interference?
Just FYI, I tested both harnesses in my possession, one with the relay and one without. While the relay itself produces a single "click" sound when the remote signal is sent from the head unit (expected, as it is a relay), I did not hear any interference caused by it's inclusion nor proximity from the RCA's.