How about a photo of the larger Screen display in action . Our Truck is not here right now ,but I will measure the Display , I think I read there is a 10" & a 12" displays .
I would look up the wiring pin layout on the Trucks Plug & use a multimeter or test light to see if you are getting 12VDC at the Plug pin , if not take it to a dealer if under warranty . The was a Recall for Trailer system .
Could be a bad pin on the Trucks 7 pin plug .
If you have reverse lights on the Truck & have a pin on the Trailer Harness its self , to activate the Reverse light fixture , it would be easy to wire it to the Trucks Harness .
Could be a programming issue also , what Plug on the Truck are you using , 7 pin or 4 ?
https://apsautoparts.com/product_info.php?products_id=37915
Got them from American Trucks
https://www.americantrucks.com/ranger-rocker-armor-side-step-bars-matte-black-ia06sbc9b.html
Have to look up the name & probably not for everyone , also body mount ,light weight Aluminum , won't make much of a rock slider , but tucks up nicely .
Works for us old people .
Had that happen to our 2025 , all kinds of messages on the display , almost no Brakes , they replaced the EBB & ABS Module . It scared the crap out of my wife , she didn't make to the end of the street & lost braking . I found that pumping the pedal ,the Truck would slow down , scary !
Got the Ranger back yesterday , seems they replaced the complete EBB & PMI''d ( not sure what that means ) the ABS module & bled the Brakes .
I will post the work done page if anyone wants to see it .They said they pulled strings to get the parts early & its the fist time this problem has come...
We had the Bed liner installed by the Dealer when we purchased the Ranger , it was bare when we purchased it . We took the Truck back & the had it for less then a day , they did a good job , lots good . My F150 didn't have one & after 14 years looked bad , my Super duty had it from the factory...
Well I traded in a 2021 Bronco Sport in for this Ranger & I was done with the BS after the third Water Pump in 33K miles , not to mention all the other issues (RDU replaced , Injector issues & other Nickel & Dime others )
They gave us a very good Trade in $$ & we like the Ranger so much more...
Of course when the Tech. started the Truck , no codes . Went for a test ride & all was ok , he updated the Trailer control Module & when for a second test drive & BAM , no or little Brakes & all kinds of the same messages , kinda scary . Has to be towed to the Dealer , he thinks something is...
Our 2025 Ranger XLT ( 850 miles )had a host of Messages like what the OP has , No or little Brakes , mobile Techs will come out tomorrow .
will keep update & what they say , it will probably need a Toe to the Dealer Advanced Braking system needs service , was one of them , but it seemed...