So I have come into an HD radio tuner that I want to install in my vehicle. Now the problem is that it requires that I connect it to the HU with RCA's and I am still running the stock HU for now. Is there a way to wire it in using an line converter? Am I just completely wrong and the stock HU for a 2002 has RCA outputs on it so I am asking this for no reason? I don't know if it makes a difference but I have the MACH system w/ sub.