Rear Off Selection - what does it do?

[Bloomer]

On the Display function of the Navigation System is a Rear Off selection that beeps when I touch it, but doesn't appear to functionally do anything. Anyone know if it is supposed to do something other than just beep when selected? Wondering if I have something not working properly with my nav system.

Nothing in the Nav system owner guide that I could find referring to its function or lack of function, either.

Any thoughts?

 

[Bloomer]

 

[Motleyone]

I think it is for controlling the rear air if the truck is not equiped with rear controls. I will check my NAV control book for sure.

 

[sdnative]

What year? Backup camera?

 

[Bloomer]

Thanks. I looked through the Nav book and didn't see anything. I thought either rear air control or control to shut off rear camera. Doesn't do either. Also doesn't toggle to Rear On when pushed.

2006, has rear camera, has rear air and controls.

 

[perrobravo]

I assume that button shuts off the rear video screen, but haven't dared to touch it for fear my kids might have to actually look out the windows.