With the factory radio, it's really an either or option. This would use the same three pins that the tailgate camera uses.
However, it turns out that our radio has inputs for three cameras. But the other two are not enabled. Customtronix has figured out how to enable them, but it's not cheap. That said, what they offer is a software version of the Lockpick, but their version is much better and does more.
I bought their jailbreak, and instead of using their harness, which has RCA inputs. I pinned the cargo cam input the same way the factory tailgate camera is pinned. Except, I used the cargo cam input cavities.
Just like the tailgate camera, our trucks are partially wired for the cargo camera. I made a harness that adds in the missing wires. The other thing I did was steal power from the cargo cam for use with my front bumper camera. I tested that out and all three cameras work. Right now, I've disabled my front bumper camera, because it's not mounted yet. I'll try doing that this afternoon. It's all wired and ready to go.
Here is the result:
Software button added by Customtronix.
