I was able to pull up 70chall440's TechAuthority backup camera schematic from his vin posted earlier which shows the wiring at radio pins 31,32,33 coming from the CHMSL cargo cam (center high mount stop light/3rd brake Lt).
NOTE: 2500's & up may have the wiring in those pins for the optional 3rd Brake light cargo cam (CHMSL).
See:
2014 V8 2500 Factory Cam in Mirror w CHMSL Cam in Radio Diagram
@70chall440,
You don't have a Cargo Camera Option do you?
If not that is why those pins get insulated and tapped out of the way. ( They can actually be moved to another video input pin set with a Customtronix RAX jailbreak (maybe pins 24,25 & ??) but I would have to dig through Jeepguy's Adding CHMSL camera thread to locate the correct pins for all 3 camera options. EDIT see below:
______ (
Sig / Sig Rtn / Shld)
Backup Cam: 31 / 32 / 33
CHMSL Cam: 21 / 22 / 23
Front Cam: . 24 / 25 / 26