Side cameras will not turn when when turn signals activated

[lacoune]

Good morning all,
I owe a 2018 Thor ACE 30.4. It has an Axxera multimedia player.

When I manually activate the rear camera, it works well. When running the RV and activating the R on transmission, rear camera image is not displayed. Same thing for side cameras (only work when the rear camera is manually operated). I know all 3 cameras are hooked and working. The issue is they no longer automatically go on when driving. The camera menu is set to ON on the Axxera setting menu. Antonella can help me?

 

[16ACE27]

There is a disconnect between the 3 camera multiplexer box 's trigger wire OUT and the radio's trigger wire IN. Time to break out the manuals for the two devices and a multimeter and start tracing wires.