Factory trailer brake controller - can it work automatically below 15 mph?

[JF19Longhorn]

Confirmed mine does the same this past weekend. It can be very dangerous if you're not planning for it.

 

[Triple X]

My 2021 does this also

 

[Brutal_HO]

I expect the HD brake controller is the same.

Here's a a link to a comprehensive technical evaluation done by one of our HDRAMS members. Original link to HDRAMS thread is in there as well.

Factory Trailer Brake Controller Troubleshooting and Technical Info (from HDRAMS)

Full credit goes to HDRAMS member Tom2531. Reprinted below. https://hdrams.com/forum/index.php?threads/brake-controller-troubleshooting-technical-info.6004/ This post is about the brake controller on the 2021 HD Ram. First, my story. Second some reverse engineering and description of the...

5thgenrams.com

 

[ManBOOYA]

I expect the HD brake controller is the same.

Here's a a link to a comprehensive technical evaluation done by one of our HDRAMS members. Original link to HDRAMS thread is in there as well.

Factory Trailer Brake Controller Troubleshooting and Technical Info (from HDRAMS)

Full credit goes to HDRAMS member Tom2531. Reprinted below. https://hdrams.com/forum/index.php?threads/brake-controller-troubleshooting-technical-info.6004/ This post is about the brake controller on the 2021 HD Ram. First, my story. Second some reverse engineering and description of the...

5thgenrams.com

There is a ton of information in that post

Next time I try towing I’m going to try some of the other settings (heavy electric etc ) to see if there is a difference or if there is some kind of short causing the issue

 

[Gixxers]

Does anyone know if ram has a fix for this, I just purchased a 2022 last week and the trailer brakes drop off at 15mph truck has 800 miles so far

 

[n8zcc]

My factory trailer brake controller stops working when my speed drops to 15 mph and below.

Actually, the ITBM starts reducing the braking signal to the trailer when travel speeds fall below 30 MPH. I first noticed this on my 2015 and RAM introduced a software update in November of 2015 for the ABS and trailer brake module which altered the braking behavior but still pulled back braking as travel speed fell below 30 MPH.

Just about every RAM forum has a discussion like this for each MY since this issue first appeared with the 2015 ITBM.

If anyone is interested in actually watching what the ITBM outputs, get one of these devices and watch (in amazement) the braking signals.

https://smile.amazon.com/gp/product/B073FJ5NVL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1