So I upgraded all 4 speakers in my SL to Infinity, and boy are they power hungry. I have the stereo at 1/2 volume to listen at normal level. I want to install a 4ch amp, but prefer not to tap the original wire harness if I can avoid it. Mine has the backup camera, navigation, XM, timer controls, etc.etc.
I’d like to preserve all the original features in the harness. Where could I find the right one? I see some available out here, but hey appear to be for after market use. I want a pass-through adapter that I can splice into for the speakers. Later on, I may end up tapping into the rear-view camera to upgrade to Dashcam.