Hi all, so I tried to install my new pioneer reverse camera into my head unit which is also pioneer and as per the photos, I used twisted the red wire (which is the 12 volt one) with the purple reverse wire where I snipped off the metal end and wrapped some tape around both wires before soldering it to see if I could get a signal, I also got some sand paper and scratched a metal part behind the head unit and just put some tape over it so it grounds before soldering it, but it isn't showing any signal. Where did I go wrong?
Worth noting, the purple wire looks like copper and the red wire looks like just regular metal? In the photo you can also see the yellow and brown rca connected and on the tag it says "rear review camera in" which I joined together and connected one end on the back of the head unit. One small question, that metal part where the black wire is sitting, will that rust because it's bare metal now?