Terlecki

i am having this problem right now so are you saying to buy a new cable and it should work?

So I installed the appradio two and so far works great just a couple bug but i cant get my apps to run because i dont have the parking break wire in but problem is i tried soundman bypass with the relay and it wont work because it ask me to hit ok and it wont let me. I tried the swith and i hit the ok button and then it shows me a black blank screen. Has someone else had this problem and how did you fix it??