Air suspension, cruise control, electronic brake all fail same time

[MIGMAN]

While driving 2017 1500 on freeway with cruise control, towing my flatbed with no load suddenly the cruise shuts off and I get a traction control symbol come on, and a few notices flash on dash. Service air suspension, electronic brake control, trailer brake controller. The ABS light is NOT on. So I go to YouTube and blogs. All the associated fuses are good. Tried all the suggested remedies, holding the up and down air suspension buttons for 40 seconds, going to the settings in the suspension modes, disconnect the battery overnight. Nothing responded, nothing works. Scanned but got no codes. Suspension is down at the entry exit position.
I know there are similar post with some good results. Nothing here. I was hoping that with 3 things going bad at once there would be one fuse that effect them all. Before I drop the truck at the dealer and drain my bank account, any good ideas I have not tried.

 

[62Blazer]

It may or may not actually be everything "failing" at the same time. Sometimes when one system "fails" the default is to disable some other systems. For example if you get any brake system related codes it will disable the cruise control....doesn't mean the cruise "failed", just means there are some parameters or safety factors where they decided you shouldn't be using cruise with the brake issue. Another example is that remote start will not work if you have a check engine light, low on fuel, the hood is open, etc.... The remote start did not "fail", it's just deactivated because of other parameters are not met.

Wouldn't be surprised that if a single issue with the air suspension simply deactivated cruise and stability control.

Of course with that said, there is always a chance all the systems did fail. Which could be caused by loosing a common ground or power feed. But just keep in mind what I said above when diagnosing the issue and what you should look for.

 

[Mojo88]

..... All the associated fuses are good. ......

Did you use a test light to check the fuses??? Sometimes a visual check is not adequate.

 

[Marshall]

battery fully charged, and at 12.4v sitting , should be about 14+ running
Check all the cable connectors , other then that no clue.

the cruise will turn off on these if computer sees anything it don't like.