My wife and I both have 700's in each of our cars. Unfortunately her Nissan had a very bad grounding hiss from the Bose amp with the Metra harness. I researched all I could and came up with needing a scosche or PAC harness which uses the high level outputs . after installing the Scosche harness, I lost all sound output on her unit. I am at a loss as to what could affect both high-level and low-level output.
Needless to say I have put my unit into her car and everything is working, so I know it was not a harness issue. I figure I shorted something, but I don't think this is a Pico fuse issue. Is it?