OK, I know all about the ebake ground...did that. I know all about the supposed bypass relay for the radio itself... BUT HERE IS AN INTERESTED QUESTION and PLEASE PAY ATTENSION TO WHAT IS BEING ASKED: I have bypassed the e-brake, I have great video on my pioneer avh4000, I put a "line out" to the top screen and it works great, until you travel faster than 3 MPH !!! Then it jumps to navigation screen ??? So, I found the speed sensor wire and clipped it. So, now both screens work great at any MPH ( FOR ABOUT 2 MINUTES !!!!!, then the top screen only Goes Blank...) This is a very advanced question, I don't know if anyone has every been here with a 1001-2004 Lexus SC 430. (2005-2005 are wired different) So, anyone know what is the issue now ? I hope some of my clubLexus brothers or sisters can help....