I was trying to put my Pioneer avh-p5200dvd in a ran into a bit of a speed bump. I made all my connections to the wiring harness, I even added in the emergency brake bypass. When i connected it to the stock harness and got nothing so I got out my test light. I checked the constant wire to make sure it was in the right place and as soon as it lit up, it went off. After that, the pioneer still wouldnt come on but now the stock radio wont come on anymore either. It lights up as well as the HUD and HVAC but none show anything on the displays and are unresponsive to button commands. Does anyone have any insight as to why Im having such a hard time.