After three days of trying, I finally was able to successfully install E313 backup camera (an ebay $17.89 & free shipping). It took me three days to diagnose because I was having doubts to the vary inexpensive camera.
The problem was that I was testing with an external battery and lack of ground to Pin 23 showed a very faint video. Solution below:
Pin 24 = +6V Power --- (I did not use this. Powered from 12V reverse light)
Pin 23 = Video V- (Shield) ----(This connector is not grounded, infinite resistance)
Pin 22 = Video + ---- Connected video from E313 rear view camera (has 75 Ohm with ground).
Pin 21 = Ground ---- Connected with Pin 23 to fix the problem.
Now I have very clear picture and works flawlessly.
TCH 2009 with Navigation