New to the site but not a newbie. I have a question. I know the cables are interchangable on N1-N3, but will they work on the N4. I really don't want to remove all the wiring/cabling but will if necessary. Thanks for helping the new guy

Should be able to. Don't quote me though. I've seen 1 n4 and wasn't paying too close attention to the harnesses.

I know you can use the cable from the brain to the headunit, harness, and antenna. Can't remember if the RCA pigtail was the same or not though

Just did the upgrade and the only cable thats different is the harness that has the RCA jacks on it. Every other cable and harness is the same.