OK - you monkeys all realize that Pioneer performed a specification change that prevents the "mute wire bypass" from working on the later machines ... right?
I'm an installer. I've been doing this work for 20+ years, so I kinda know what I'm talking about. When these Pio HDU's were initially released, the bypass worked perfectly. A few months down the road, we started to see things change. When the vehicle was driven, the picture would go out. When the vehicle came to a stop, the picture would come back on. When the nav sysyem senses that the vehicle is in motion, it cuts off the picture.